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April 12, 2016 20:55
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| # Licensed to the Apache Software Foundation (ASF) under one | |
| # or more contributor license agreements. See the NOTICE file | |
| # distributed with this work for additional information | |
| # regarding copyright ownership. The ASF licenses this file | |
| # to you under the Apache License, Version 2.0 (the | |
| # "License"); you may not use this file except in compliance | |
| # with the License. You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| calculate_heap_sizes() | |
| { | |
| case "`uname`" in | |
| Linux) | |
| system_memory_in_mb=`free -m | awk '/:/ {print $2;exit}'` | |
| system_cpu_cores=`egrep -c 'processor([[:space:]]+):.*' /proc/cpuinfo` | |
| ;; | |
| FreeBSD) | |
| system_memory_in_bytes=`sysctl hw.physmem | awk '{print $2}'` | |
| system_memory_in_mb=`expr $system_memory_in_bytes / 1024 / 1024` | |
| system_cpu_cores=`sysctl hw.ncpu | awk '{print $2}'` | |
| ;; | |
| SunOS) | |
| system_memory_in_mb=`prtconf | awk '/Memory size:/ {print $3}'` | |
| system_cpu_cores=`psrinfo | wc -l` | |
| ;; | |
| Darwin) | |
| system_memory_in_bytes=`sysctl hw.memsize | awk '{print $2}'` | |
| system_memory_in_mb=`expr $system_memory_in_bytes / 1024 / 1024` | |
| system_cpu_cores=`sysctl hw.ncpu | awk '{print $2}'` | |
| ;; | |
| *) | |
| # assume reasonable defaults for e.g. a modern desktop or | |
| # cheap server | |
| system_memory_in_mb="2048" | |
| system_cpu_cores="2" | |
| ;; | |
| esac | |
| # some systems like the raspberry pi don't report cores, use at least 1 | |
| if [ "$system_cpu_cores" -lt "1" ] | |
| then | |
| system_cpu_cores="1" | |
| fi | |
| # set max heap size based on the following | |
| # max(min(1/2 ram, 1024MB), min(1/4 ram, 8GB)) | |
| # calculate 1/2 ram and cap to 1024MB | |
| # calculate 1/4 ram and cap to 8192MB | |
| # pick the max | |
| half_system_memory_in_mb=`expr $system_memory_in_mb / 2` | |
| quarter_system_memory_in_mb=`expr $half_system_memory_in_mb / 2` | |
| if [ "$half_system_memory_in_mb" -gt "1024" ] | |
| then | |
| half_system_memory_in_mb="1024" | |
| fi | |
| if [ "$quarter_system_memory_in_mb" -gt "8192" ] | |
| then | |
| quarter_system_memory_in_mb="8192" | |
| fi | |
| if [ "$half_system_memory_in_mb" -gt "$quarter_system_memory_in_mb" ] | |
| then | |
| max_heap_size_in_mb="$half_system_memory_in_mb" | |
| else | |
| max_heap_size_in_mb="$quarter_system_memory_in_mb" | |
| fi | |
| MAX_HEAP_SIZE="${max_heap_size_in_mb}M" | |
| # Young gen: min(max_sensible_per_modern_cpu_core * num_cores, 1/4 * heap size) | |
| max_sensible_yg_per_core_in_mb="100" | |
| max_sensible_yg_in_mb=`expr $max_sensible_yg_per_core_in_mb "*" $system_cpu_cores` | |
| desired_yg_in_mb=`expr $max_heap_size_in_mb / 4` | |
| if [ "$desired_yg_in_mb" -gt "$max_sensible_yg_in_mb" ] | |
| then | |
| HEAP_NEWSIZE="${max_sensible_yg_in_mb}M" | |
| else | |
| HEAP_NEWSIZE="${desired_yg_in_mb}M" | |
| fi | |
| } | |
| # Determine the sort of JVM we'll be running on. | |
| java_ver_output=`"${JAVA:-java}" -version 2>&1` | |
| jvmver=`echo "$java_ver_output" | grep '[openjdk|java] version' | awk -F'"' 'NR==1 {print $2}'` | |
| JVM_VERSION=${jvmver%_*} | |
| JVM_PATCH_VERSION=${jvmver#*_} | |
| if [ "$JVM_VERSION" \< "1.7" ] ; then | |
| echo "Cassandra 2.0 and later require Java 7u25 or later." | |
| exit 1; | |
| fi | |
| if [ "$JVM_VERSION" \< "1.8" ] && [ "$JVM_PATCH_VERSION" \< "25" ] ; then | |
| echo "Cassandra 2.0 and later require Java 7u25 or later." | |
| exit 1; | |
| fi | |
| jvm=`echo "$java_ver_output" | grep -A 1 'java version' | awk 'NR==2 {print $1}'` | |
| case "$jvm" in | |
| OpenJDK) | |
| JVM_VENDOR=OpenJDK | |
| # this will be "64-Bit" or "32-Bit" | |
| JVM_ARCH=`echo "$java_ver_output" | awk 'NR==3 {print $2}'` | |
| ;; | |
| "Java(TM)") | |
| JVM_VENDOR=Oracle | |
| # this will be "64-Bit" or "32-Bit" | |
| JVM_ARCH=`echo "$java_ver_output" | awk 'NR==3 {print $3}'` | |
| ;; | |
| *) | |
| # Help fill in other JVM values | |
| JVM_VENDOR=other | |
| JVM_ARCH=unknown | |
| ;; | |
| esac | |
| # Override these to set the amount of memory to allocate to the JVM at | |
| # start-up. For production use you may wish to adjust this for your | |
| # environment. MAX_HEAP_SIZE is the total amount of memory dedicated | |
| # to the Java heap; HEAP_NEWSIZE refers to the size of the young | |
| # generation. Both MAX_HEAP_SIZE and HEAP_NEWSIZE should be either set | |
| # or not (if you set one, set the other). | |
| # | |
| # The main trade-off for the young generation is that the larger it | |
| # is, the longer GC pause times will be. The shorter it is, the more | |
| # expensive GC will be (usually). | |
| # | |
| # The example HEAP_NEWSIZE assumes a modern 8-core+ machine for decent pause | |
| # times. If in doubt, and if you do not particularly want to tweak, go with | |
| # 100 MB per physical CPU core. | |
| #MAX_HEAP_SIZE="4G" | |
| #HEAP_NEWSIZE="800M" | |
| # Set this to control the amount of arenas per-thread in glibc | |
| #export MALLOC_ARENA_MAX=4 | |
| if [ "x$MAX_HEAP_SIZE" = "x" ] && [ "x$HEAP_NEWSIZE" = "x" ]; then | |
| calculate_heap_sizes | |
| else | |
| if [ "x$MAX_HEAP_SIZE" = "x" ] || [ "x$HEAP_NEWSIZE" = "x" ]; then | |
| echo "please set or unset MAX_HEAP_SIZE and HEAP_NEWSIZE in pairs (see cassandra-env.sh)" | |
| exit 1 | |
| fi | |
| fi | |
| if [ "x$MALLOC_ARENA_MAX" = "x" ] | |
| then | |
| export MALLOC_ARENA_MAX=4 | |
| fi | |
| # Specifies the default port over which Cassandra will be available for | |
| # JMX connections. | |
| # For security reasons, you should not expose this port to the internet. Firewall it if needed. | |
| JMX_PORT="7199" | |
| # Here we create the arguments that will get passed to the jvm when | |
| # starting cassandra. | |
| # enable assertions. disabling this in production will give a modest | |
| # performance benefit (around 5%). | |
| JVM_OPTS="$JVM_OPTS -ea" | |
| # add the jamm javaagent | |
| JVM_OPTS="$JVM_OPTS -javaagent:$CASSANDRA_HOME/lib/jamm-0.3.0.jar" | |
| # some JVMs will fill up their heap when accessed via JMX, see CASSANDRA-6541 | |
| JVM_OPTS="$JVM_OPTS -XX:+CMSClassUnloadingEnabled" | |
| # enable thread priorities, primarily so we can give periodic tasks | |
| # a lower priority to avoid interfering with client workload | |
| JVM_OPTS="$JVM_OPTS -XX:+UseThreadPriorities" | |
| # allows lowering thread priority without being root. see | |
| # http://tech.stolsvik.com/2010/01/linux-java-thread-priorities-workaround.html | |
| JVM_OPTS="$JVM_OPTS -XX:ThreadPriorityPolicy=42" | |
| # min and max heap sizes should be set to the same value to avoid | |
| # stop-the-world GC pauses during resize, and so that we can lock the | |
| # heap in memory on startup to prevent any of it from being swapped | |
| # out. | |
| JVM_OPTS="$JVM_OPTS -Xms${MAX_HEAP_SIZE}" | |
| JVM_OPTS="$JVM_OPTS -Xmx${MAX_HEAP_SIZE}" | |
| JVM_OPTS="$JVM_OPTS -Xmn${HEAP_NEWSIZE}" | |
| JVM_OPTS="$JVM_OPTS -XX:+HeapDumpOnOutOfMemoryError" | |
| # set jvm HeapDumpPath with CASSANDRA_HEAPDUMP_DIR | |
| if [ "x$CASSANDRA_HEAPDUMP_DIR" != "x" ]; then | |
| JVM_OPTS="$JVM_OPTS -XX:HeapDumpPath=$CASSANDRA_HEAPDUMP_DIR/cassandra-`date +%s`-pid$$.hprof" | |
| fi | |
| startswith() { [ "${1#$2}" != "$1" ]; } | |
| # Per-thread stack size. | |
| JVM_OPTS="$JVM_OPTS -Xss256k" | |
| # Larger interned string table, for gossip's benefit (CASSANDRA-6410) | |
| JVM_OPTS="$JVM_OPTS -XX:StringTableSize=1000003" | |
| # GC tuning options | |
| JVM_OPTS="$JVM_OPTS -XX:+UseParNewGC" | |
| JVM_OPTS="$JVM_OPTS -XX:+UseConcMarkSweepGC" | |
| JVM_OPTS="$JVM_OPTS -XX:+CMSParallelRemarkEnabled" | |
| JVM_OPTS="$JVM_OPTS -XX:SurvivorRatio=8" | |
| JVM_OPTS="$JVM_OPTS -XX:MaxTenuringThreshold=1" | |
| JVM_OPTS="$JVM_OPTS -XX:CMSInitiatingOccupancyFraction=75" | |
| JVM_OPTS="$JVM_OPTS -XX:+UseCMSInitiatingOccupancyOnly" | |
| JVM_OPTS="$JVM_OPTS -XX:+UseTLAB" | |
| JVM_OPTS="$JVM_OPTS -XX:+PerfDisableSharedMem" | |
| JVM_OPTS="$JVM_OPTS -XX:CompileCommandFile=$CASSANDRA_CONF/hotspot_compiler" | |
| JVM_OPTS="$JVM_OPTS -XX:CMSWaitDuration=10000" | |
| # note: bash evals '1.7.x' as > '1.7' so this is really a >= 1.7 jvm check | |
| if { [ "$JVM_VERSION" \> "1.7" ] && [ "$JVM_VERSION" \< "1.8.0" ] && [ "$JVM_PATCH_VERSION" -ge "60" ]; } || [ "$JVM_VERSION" \> "1.8" ] ; then | |
| JVM_OPTS="$JVM_OPTS -XX:+CMSParallelInitialMarkEnabled -XX:+CMSEdenChunksRecordAlways -XX:CMSWaitDuration=10000" | |
| fi | |
| if [ "$JVM_ARCH" = "64-Bit" ] ; then | |
| JVM_OPTS="$JVM_OPTS -XX:+UseCondCardMark" | |
| fi | |
| # GC logging options | |
| JVM_OPTS="$JVM_OPTS -XX:+PrintGCDetails" | |
| JVM_OPTS="$JVM_OPTS -XX:+PrintGCDateStamps" | |
| JVM_OPTS="$JVM_OPTS -XX:+PrintHeapAtGC" | |
| JVM_OPTS="$JVM_OPTS -XX:+PrintTenuringDistribution" | |
| JVM_OPTS="$JVM_OPTS -XX:+PrintGCApplicationStoppedTime" | |
| JVM_OPTS="$JVM_OPTS -XX:+PrintPromotionFailure" | |
| #JVM_OPTS="$JVM_OPTS -XX:PrintFLSStatistics=1" | |
| JVM_OPTS="$JVM_OPTS -Xloggc:/var/log/cassandra/gc.log" | |
| JVM_OPTS="$JVM_OPTS -XX:+UseGCLogFileRotation" | |
| JVM_OPTS="$JVM_OPTS -XX:NumberOfGCLogFiles=10" | |
| JVM_OPTS="$JVM_OPTS -XX:GCLogFileSize=10M" | |
| # if using version before JDK 6u34 or 7u2 use this instead of log rotation | |
| # JVM_OPTS="$JVM_OPTS -Xloggc:/var/log/cassandra/gc-`date +%s`.log" | |
| # uncomment to have Cassandra JVM listen for remote debuggers/profilers on port 1414 | |
| # JVM_OPTS="$JVM_OPTS -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=1414" | |
| # uncomment to have Cassandra JVM log internal method compilation (developers only) | |
| # JVM_OPTS="$JVM_OPTS -XX:+UnlockDiagnosticVMOptions -XX:+LogCompilation" | |
| # JVM_OPTS="$JVM_OPTS -XX:+UnlockCommercialFeatures -XX:+FlightRecorder" | |
| # Prefer binding to IPv4 network intefaces (when net.ipv6.bindv6only=1). See | |
| # http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6342561 (short version: | |
| # comment out this entry to enable IPv6 support). | |
| JVM_OPTS="$JVM_OPTS -Djava.net.preferIPv4Stack=true" | |
| # jmx: metrics and administration interface | |
| # | |
| # add this if you're having trouble connecting: | |
| # JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname=<public name>" | |
| # | |
| # see | |
| # https://blogs.oracle.com/jmxetc/entry/troubleshooting_connection_problems_in_jconsole | |
| # for more on configuring JMX through firewalls, etc. (Short version: | |
| # get it working with no firewall first.) | |
| # | |
| # Cassandra ships with JMX accessible *only* from localhost. | |
| # To enable remote JMX connections, uncomment lines below | |
| # with authentication and/or ssl enabled. See https://wiki.apache.org/cassandra/JmxSecurity | |
| # | |
| if [ "x$LOCAL_JMX" = "x" ]; then | |
| LOCAL_JMX=yes | |
| fi | |
| if [ "$LOCAL_JMX" = "yes" ]; then | |
| JVM_OPTS="$JVM_OPTS -Dcassandra.jmx.local.port=$JMX_PORT -XX:+DisableExplicitGC" | |
| else | |
| JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.port=$JMX_PORT" | |
| JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT" | |
| JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=false" | |
| JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.authenticate=true" | |
| JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.password.file=/etc/cassandra/jmxremote.password" | |
| # JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStore=/path/to/keystore" | |
| # JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStorePassword=<keystore-password>" | |
| # JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStore=/path/to/truststore" | |
| # JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStorePassword=<truststore-password>" | |
| # JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.need.client.auth=true" | |
| # JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.registry.ssl=true" | |
| # JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.enabled.protocols=<enabled-protocols>" | |
| # JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.enabled.cipher.suites=<enabled-cipher-suites>" | |
| fi | |
| # To use mx4j, an HTML interface for JMX, add mx4j-tools.jar to the lib/ | |
| # directory. | |
| # See http://wiki.apache.org/cassandra/Operations#Monitoring_with_MX4J | |
| # By default mx4j listens on 0.0.0.0:8081. Uncomment the following lines | |
| # to control its listen address and port. | |
| #MX4J_ADDRESS="-Dmx4jaddress=127.0.0.1" | |
| #MX4J_PORT="-Dmx4jport=8081" | |
| # Cassandra uses SIGAR to capture OS metrics CASSANDRA-7838 | |
| # for SIGAR we have to set the java.library.path | |
| # to the location of the native libraries. | |
| JVM_OPTS="$JVM_OPTS -Djava.library.path=$CASSANDRA_HOME/lib/sigar-bin" | |
| JVM_OPTS="$JVM_OPTS $MX4J_ADDRESS" | |
| JVM_OPTS="$JVM_OPTS $MX4J_PORT" | |
| JVM_OPTS="$JVM_OPTS $JVM_EXTRA_OPTS" |
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| # Licensed to the Apache Software Foundation (ASF) under one | |
| # or more contributor license agreements. See the NOTICE file | |
| # distributed with this work for additional information | |
| # regarding copyright ownership. The ASF licenses this file | |
| # to you under the Apache License, Version 2.0 (the | |
| # "License"); you may not use this file except in compliance | |
| # with the License. You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| calculate_heap_sizes() | |
| { | |
| case "`uname`" in | |
| Linux) | |
| system_memory_in_mb=`free -m | awk '/:/ {print $2;exit}'` | |
| system_cpu_cores=`egrep -c 'processor([[:space:]]+):.*' /proc/cpuinfo` | |
| ;; | |
| FreeBSD) | |
| system_memory_in_bytes=`sysctl hw.physmem | awk '{print $2}'` | |
| system_memory_in_mb=`expr $system_memory_in_bytes / 1024 / 1024` | |
| system_cpu_cores=`sysctl hw.ncpu | awk '{print $2}'` | |
| ;; | |
| SunOS) | |
| system_memory_in_mb=`prtconf | awk '/Memory size:/ {print $3}'` | |
| system_cpu_cores=`psrinfo | wc -l` | |
| ;; | |
| Darwin) | |
| system_memory_in_bytes=`sysctl hw.memsize | awk '{print $2}'` | |
| system_memory_in_mb=`expr $system_memory_in_bytes / 1024 / 1024` | |
| system_cpu_cores=`sysctl hw.ncpu | awk '{print $2}'` | |
| ;; | |
| *) | |
| # assume reasonable defaults for e.g. a modern desktop or | |
| # cheap server | |
| system_memory_in_mb="2048" | |
| system_cpu_cores="2" | |
| ;; | |
| esac | |
| # some systems like the raspberry pi don't report cores, use at least 1 | |
| if [ "$system_cpu_cores" -lt "1" ] | |
| then | |
| system_cpu_cores="1" | |
| fi | |
| # set max heap size based on the following | |
| # max(min(1/2 ram, 1024MB), min(1/4 ram, 8GB)) | |
| # calculate 1/2 ram and cap to 1024MB | |
| # calculate 1/4 ram and cap to 8192MB | |
| # pick the max | |
| half_system_memory_in_mb=`expr $system_memory_in_mb / 2` | |
| quarter_system_memory_in_mb=`expr $half_system_memory_in_mb / 2` | |
| if [ "$half_system_memory_in_mb" -gt "1024" ] | |
| then | |
| half_system_memory_in_mb="1024" | |
| fi | |
| if [ "$quarter_system_memory_in_mb" -gt "8192" ] | |
| then | |
| quarter_system_memory_in_mb="8192" | |
| fi | |
| if [ "$half_system_memory_in_mb" -gt "$quarter_system_memory_in_mb" ] | |
| then | |
| max_heap_size_in_mb="$half_system_memory_in_mb" | |
| else | |
| max_heap_size_in_mb="$quarter_system_memory_in_mb" | |
| fi | |
| MAX_HEAP_SIZE="${max_heap_size_in_mb}M" | |
| # Young gen: min(max_sensible_per_modern_cpu_core * num_cores, 1/4 * heap size) | |
| max_sensible_yg_per_core_in_mb="100" | |
| max_sensible_yg_in_mb=`expr $max_sensible_yg_per_core_in_mb "*" $system_cpu_cores` | |
| desired_yg_in_mb=`expr $max_heap_size_in_mb / 4` | |
| if [ "$desired_yg_in_mb" -gt "$max_sensible_yg_in_mb" ] | |
| then | |
| HEAP_NEWSIZE="${max_sensible_yg_in_mb}M" | |
| else | |
| HEAP_NEWSIZE="${desired_yg_in_mb}M" | |
| fi | |
| } | |
| # Determine the sort of JVM we'll be running on. | |
| java_ver_output=`"${JAVA:-java}" -version 2>&1` | |
| jvmver=`echo "$java_ver_output" | grep '[openjdk|java] version' | awk -F'"' 'NR==1 {print $2}'` | |
| JVM_VERSION=${jvmver%_*} | |
| JVM_PATCH_VERSION=${jvmver#*_} | |
| if [ "$JVM_VERSION" \< "1.8" ] ; then | |
| echo "Cassandra 3.0 and later require Java 8u40 or later." | |
| exit 1; | |
| fi | |
| if [ "$JVM_VERSION" \< "1.8" ] && [ "$JVM_PATCH_VERSION" \< "40" ] ; then | |
| echo "Cassandra 3.0 and later require Java 8u40 or later." | |
| exit 1; | |
| fi | |
| jvm=`echo "$java_ver_output" | grep -A 1 'java version' | awk 'NR==2 {print $1}'` | |
| case "$jvm" in | |
| OpenJDK) | |
| JVM_VENDOR=OpenJDK | |
| # this will be "64-Bit" or "32-Bit" | |
| JVM_ARCH=`echo "$java_ver_output" | awk 'NR==3 {print $2}'` | |
| ;; | |
| "Java(TM)") | |
| JVM_VENDOR=Oracle | |
| # this will be "64-Bit" or "32-Bit" | |
| JVM_ARCH=`echo "$java_ver_output" | awk 'NR==3 {print $3}'` | |
| ;; | |
| *) | |
| # Help fill in other JVM values | |
| JVM_VENDOR=other | |
| JVM_ARCH=unknown | |
| ;; | |
| esac | |
| # Override these to set the amount of memory to allocate to the JVM at | |
| # start-up. For production use you may wish to adjust this for your | |
| # environment. MAX_HEAP_SIZE is the total amount of memory dedicated | |
| # to the Java heap. HEAP_NEWSIZE refers to the size of the young | |
| # generation. Both MAX_HEAP_SIZE and HEAP_NEWSIZE should be either set | |
| # or not (if you set one, set the other). | |
| # | |
| # The main trade-off for the young generation is that the larger it | |
| # is, the longer GC pause times will be. The shorter it is, the more | |
| # expensive GC will be (usually). | |
| # | |
| # The example HEAP_NEWSIZE assumes a modern 8-core+ machine for decent pause | |
| # times. If in doubt, and if you do not particularly want to tweak, go with | |
| # 100 MB per physical CPU core. | |
| #MAX_HEAP_SIZE="4G" | |
| #HEAP_NEWSIZE="800M" | |
| # Set this to control the amount of arenas per-thread in glibc | |
| #export MALLOC_ARENA_MAX=4 | |
| # only calculate the size if it's not set manually | |
| if [ "x$MAX_HEAP_SIZE" = "x" ] && [ "x$HEAP_NEWSIZE" = "x" ]; then | |
| calculate_heap_sizes | |
| else | |
| if [ "x$MAX_HEAP_SIZE" = "x" ] || [ "x$HEAP_NEWSIZE" = "x" ]; then | |
| echo "please set or unset MAX_HEAP_SIZE and HEAP_NEWSIZE in pairs (see cassandra-env.sh)" | |
| exit 1 | |
| fi | |
| fi | |
| if [ "x$MALLOC_ARENA_MAX" = "x" ] ; then | |
| export MALLOC_ARENA_MAX=4 | |
| fi | |
| #GC log path has to be defined here because it needs to access CASSANDRA_HOME | |
| JVM_OPTS="$JVM_OPTS -Xloggc:/var/log/cassandra/gc.log" | |
| # Here we create the arguments that will get passed to the jvm when | |
| # starting cassandra. | |
| # Read user-defined JVM options from jvm.options file | |
| JVM_OPTS_FILE=$CASSANDRA_CONF/jvm.options | |
| for opt in `grep "^-" $JVM_OPTS_FILE` | |
| do | |
| JVM_OPTS="$JVM_OPTS $opt" | |
| done | |
| # Check what parameters were defined on jvm.options file to avoid conflicts | |
| echo $JVM_OPTS | grep -q Xmn | |
| DEFINED_XMN=$? | |
| echo $JVM_OPTS | grep -q Xmx | |
| DEFINED_XMX=$? | |
| echo $JVM_OPTS | grep -q Xms | |
| DEFINED_XMS=$? | |
| echo $JVM_OPTS | grep -q UseConcMarkSweepGC | |
| USING_CMS=$? | |
| # We only set -Xms and -Xmx if they were not defined on jvm.options file | |
| # If defined, both Xmx and Xms should be defined together. | |
| if [ $DEFINED_XMX -ne 0 ] && [ $DEFINED_XMS -ne 0 ]; then | |
| JVM_OPTS="$JVM_OPTS -Xms${MAX_HEAP_SIZE}" | |
| JVM_OPTS="$JVM_OPTS -Xmx${MAX_HEAP_SIZE}" | |
| elif [ $DEFINED_XMX -ne 0 ] || [ $DEFINED_XMS -ne 0 ]; then | |
| echo "Please set or unset -Xmx and -Xms flags in pairs on jvm.options file." | |
| exit 1 | |
| fi | |
| # We only set -Xmn flag if it was not defined in jvm.options file | |
| # and if the CMS GC is being used | |
| # If defined, both Xmn and Xmx should be defined together. | |
| if [ $DEFINED_XMN -eq 0 ] && [ $DEFINED_XMX -ne 0 ]; then | |
| echo "Please set or unset -Xmx and -Xmn flags in pairs on jvm.options file." | |
| exit 1 | |
| elif [ $DEFINED_XMN -ne 0 ] && [ $USING_CMS -eq 0 ]; then | |
| JVM_OPTS="$JVM_OPTS -Xmn${HEAP_NEWSIZE}" | |
| fi | |
| if [ "$JVM_ARCH" = "64-Bit" ] && [ $USING_CMS -eq 0 ]; then | |
| JVM_OPTS="$JVM_OPTS -XX:+UseCondCardMark" | |
| fi | |
| # provides hints to the JIT compiler | |
| JVM_OPTS="$JVM_OPTS -XX:CompileCommandFile=$CASSANDRA_CONF/hotspot_compiler" | |
| # add the jamm javaagent | |
| JVM_OPTS="$JVM_OPTS -javaagent:$CASSANDRA_HOME/lib/jamm-0.3.0.jar" | |
| # set jvm HeapDumpPath with CASSANDRA_HEAPDUMP_DIR | |
| if [ "x$CASSANDRA_HEAPDUMP_DIR" != "x" ]; then | |
| JVM_OPTS="$JVM_OPTS -XX:HeapDumpPath=$CASSANDRA_HEAPDUMP_DIR/cassandra-`date +%s`-pid$$.hprof" | |
| fi | |
| # jmx: metrics and administration interface | |
| # | |
| # add this if you're having trouble connecting: | |
| # JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname=<public name>" | |
| # | |
| # see | |
| # https://blogs.oracle.com/jmxetc/entry/troubleshooting_connection_problems_in_jconsole | |
| # for more on configuring JMX through firewalls, etc. (Short version: | |
| # get it working with no firewall first.) | |
| # | |
| # Cassandra ships with JMX accessible *only* from localhost. | |
| # To enable remote JMX connections, uncomment lines below | |
| # with authentication and/or ssl enabled. See https://wiki.apache.org/cassandra/JmxSecurity | |
| # | |
| if [ "x$LOCAL_JMX" = "x" ]; then | |
| LOCAL_JMX=yes | |
| fi | |
| # Specifies the default port over which Cassandra will be available for | |
| # JMX connections. | |
| # For security reasons, you should not expose this port to the internet. Firewall it if needed. | |
| JMX_PORT="7199" | |
| if [ "$LOCAL_JMX" = "yes" ]; then | |
| JVM_OPTS="$JVM_OPTS -Dcassandra.jmx.local.port=$JMX_PORT -XX:+DisableExplicitGC" | |
| else | |
| JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.port=$JMX_PORT" | |
| JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT" | |
| JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=false" | |
| JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.authenticate=true" | |
| JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.password.file=/etc/cassandra/jmxremote.password" | |
| # JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStore=/path/to/keystore" | |
| # JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStorePassword=<keystore-password>" | |
| # JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStore=/path/to/truststore" | |
| # JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStorePassword=<truststore-password>" | |
| # JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.need.client.auth=true" | |
| # JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.registry.ssl=true" | |
| # JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.enabled.protocols=<enabled-protocols>" | |
| # JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.enabled.cipher.suites=<enabled-cipher-suites>" | |
| fi | |
| # To use mx4j, an HTML interface for JMX, add mx4j-tools.jar to the lib/ | |
| # directory. | |
| # See http://wiki.apache.org/cassandra/Operations#Monitoring_with_MX4J | |
| # By default mx4j listens on 0.0.0.0:8081. Uncomment the following lines | |
| # to control its listen address and port. | |
| #MX4J_ADDRESS="-Dmx4jaddress=127.0.0.1" | |
| #MX4J_PORT="-Dmx4jport=8081" | |
| # Cassandra uses SIGAR to capture OS metrics CASSANDRA-7838 | |
| # for SIGAR we have to set the java.library.path | |
| # to the location of the native libraries. | |
| JVM_OPTS="$JVM_OPTS -Djava.library.path=$CASSANDRA_HOME/lib/sigar-bin" | |
| JVM_OPTS="$JVM_OPTS $MX4J_ADDRESS" | |
| JVM_OPTS="$JVM_OPTS $MX4J_PORT" | |
| JVM_OPTS="$JVM_OPTS $JVM_EXTRA_OPTS" |
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| # Cassandra storage config YAML | |
| # NOTE: | |
| # See http://wiki.apache.org/cassandra/StorageConfiguration for | |
| # full explanations of configuration directives | |
| # /NOTE | |
| # The name of the cluster. This is mainly used to prevent machines in | |
| # one logical cluster from joining another. | |
| cluster_name: 'Test Cluster' | |
| # This defines the number of tokens randomly assigned to this node on the ring | |
| # The more tokens, relative to other nodes, the larger the proportion of data | |
| # that this node will store. You probably want all nodes to have the same number | |
| # of tokens assuming they have equal hardware capability. | |
| # | |
| # If you leave this unspecified, Cassandra will use the default of 1 token for legacy compatibility, | |
| # and will use the initial_token as described below. | |
| # | |
| # Specifying initial_token will override this setting on the node's initial start, | |
| # on subsequent starts, this setting will apply even if initial token is set. | |
| # | |
| # If you already have a cluster with 1 token per node, and wish to migrate to | |
| # multiple tokens per node, see http://wiki.apache.org/cassandra/Operations | |
| num_tokens: 256 | |
| # initial_token allows you to specify tokens manually. While you can use # it with | |
| # vnodes (num_tokens > 1, above) -- in which case you should provide a | |
| # comma-separated list -- it's primarily used when adding nodes # to legacy clusters | |
| # that do not have vnodes enabled. | |
| # initial_token: | |
| # See http://wiki.apache.org/cassandra/HintedHandoff | |
| # May either be "true" or "false" to enable globally, or contain a list | |
| # of data centers to enable per-datacenter. | |
| # hinted_handoff_enabled: DC1,DC2 | |
| hinted_handoff_enabled: true | |
| # this defines the maximum amount of time a dead host will have hints | |
| # generated. After it has been dead this long, new hints for it will not be | |
| # created until it has been seen alive and gone down again. | |
| max_hint_window_in_ms: 10800000 # 3 hours | |
| # Maximum throttle in KBs per second, per delivery thread. This will be | |
| # reduced proportionally to the number of nodes in the cluster. (If there | |
| # are two nodes in the cluster, each delivery thread will use the maximum | |
| # rate; if there are three, each will throttle to half of the maximum, | |
| # since we expect two nodes to be delivering hints simultaneously.) | |
| hinted_handoff_throttle_in_kb: 1024 | |
| # Number of threads with which to deliver hints; | |
| # Consider increasing this number when you have multi-dc deployments, since | |
| # cross-dc handoff tends to be slower | |
| max_hints_delivery_threads: 2 | |
| # Maximum throttle in KBs per second, total. This will be | |
| # reduced proportionally to the number of nodes in the cluster. | |
| batchlog_replay_throttle_in_kb: 1024 | |
| # Authentication backend, implementing IAuthenticator; used to identify users | |
| # Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthenticator, | |
| # PasswordAuthenticator}. | |
| # | |
| # - AllowAllAuthenticator performs no checks - set it to disable authentication. | |
| # - PasswordAuthenticator relies on username/password pairs to authenticate | |
| # users. It keeps usernames and hashed passwords in system_auth.credentials table. | |
| # Please increase system_auth keyspace replication factor if you use this authenticator. | |
| # If using PasswordAuthenticator, CassandraRoleManager must also be used (see below) | |
| authenticator: AllowAllAuthenticator | |
| # Authorization backend, implementing IAuthorizer; used to limit access/provide permissions | |
| # Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthorizer, | |
| # CassandraAuthorizer}. | |
| # | |
| # - AllowAllAuthorizer allows any action to any user - set it to disable authorization. | |
| # - CassandraAuthorizer stores permissions in system_auth.permissions table. Please | |
| # increase system_auth keyspace replication factor if you use this authorizer. | |
| authorizer: AllowAllAuthorizer | |
| # Part of the Authentication & Authorization backend, implementing IRoleManager; used | |
| # to maintain grants and memberships between roles. | |
| # Out of the box, Cassandra provides org.apache.cassandra.auth.CassandraRoleManager, | |
| # which stores role information in the system_auth keyspace. Most functions of the | |
| # IRoleManager require an authenticated login, so unless the configured IAuthenticator | |
| # actually implements authentication, most of this functionality will be unavailable. | |
| # | |
| # - CassandraRoleManager stores role data in the system_auth keyspace. Please | |
| # increase system_auth keyspace replication factor if you use this role manager. | |
| role_manager: CassandraRoleManager | |
| # Validity period for roles cache (fetching permissions can be an | |
| # expensive operation depending on the authorizer). Granted roles are cached for | |
| # authenticated sessions in AuthenticatedUser and after the period specified | |
| # here, become eligible for (async) reload. | |
| # Defaults to 2000, set to 0 to disable. | |
| # Will be disabled automatically for AllowAllAuthenticator. | |
| roles_validity_in_ms: 2000 | |
| # Refresh interval for roles cache (if enabled). | |
| # After this interval, cache entries become eligible for refresh. Upon next | |
| # access, an async reload is scheduled and the old value returned until it | |
| # completes. If roles_validity_in_ms is non-zero, then this must be | |
| # also. | |
| # Defaults to the same value as roles_validity_in_ms. | |
| # roles_update_interval_in_ms: 1000 | |
| # Validity period for permissions cache (fetching permissions can be an | |
| # expensive operation depending on the authorizer, CassandraAuthorizer is | |
| # one example). Defaults to 2000, set to 0 to disable. | |
| # Will be disabled automatically for AllowAllAuthorizer. | |
| permissions_validity_in_ms: 2000 | |
| # Refresh interval for permissions cache (if enabled). | |
| # After this interval, cache entries become eligible for refresh. Upon next | |
| # access, an async reload is scheduled and the old value returned until it | |
| # completes. If permissions_validity_in_ms is non-zero, then this must be | |
| # also. | |
| # Defaults to the same value as permissions_validity_in_ms. | |
| # permissions_update_interval_in_ms: 1000 | |
| # The partitioner is responsible for distributing groups of rows (by | |
| # partition key) across nodes in the cluster. You should leave this | |
| # alone for new clusters. The partitioner can NOT be changed without | |
| # reloading all data, so when upgrading you should set this to the | |
| # same partitioner you were already using. | |
| # | |
| # Besides Murmur3Partitioner, partitioners included for backwards | |
| # compatibility include RandomPartitioner, ByteOrderedPartitioner, and | |
| # OrderPreservingPartitioner. | |
| # | |
| partitioner: org.apache.cassandra.dht.Murmur3Partitioner | |
| # Directories where Cassandra should store data on disk. Cassandra | |
| # will spread data evenly across them, subject to the granularity of | |
| # the configured compaction strategy. | |
| # If not set, the default directory is $CASSANDRA_HOME/data/data. | |
| data_file_directories: | |
| - /var/lib/cassandra/data | |
| # commit log. when running on magnetic HDD, this should be a | |
| # separate spindle than the data directories. | |
| # If not set, the default directory is $CASSANDRA_HOME/data/commitlog. | |
| commitlog_directory: /var/lib/cassandra/commitlog | |
| # policy for data disk failures: | |
| # die: shut down gossip and client transports and kill the JVM for any fs errors or | |
| # single-sstable errors, so the node can be replaced. | |
| # stop_paranoid: shut down gossip and client transports even for single-sstable errors, | |
| # kill the JVM for errors during startup. | |
| # stop: shut down gossip and client transports, leaving the node effectively dead, but | |
| # can still be inspected via JMX, kill the JVM for errors during startup. | |
| # best_effort: stop using the failed disk and respond to requests based on | |
| # remaining available sstables. This means you WILL see obsolete | |
| # data at CL.ONE! | |
| # ignore: ignore fatal errors and let requests fail, as in pre-1.2 Cassandra | |
| disk_failure_policy: stop | |
| # policy for commit disk failures: | |
| # die: shut down gossip and Thrift and kill the JVM, so the node can be replaced. | |
| # stop: shut down gossip and Thrift, leaving the node effectively dead, but | |
| # can still be inspected via JMX. | |
| # stop_commit: shutdown the commit log, letting writes collect but | |
| # continuing to service reads, as in pre-2.0.5 Cassandra | |
| # ignore: ignore fatal errors and let the batches fail | |
| commit_failure_policy: stop | |
| # Maximum size of the key cache in memory. | |
| # | |
| # Each key cache hit saves 1 seek and each row cache hit saves 2 seeks at the | |
| # minimum, sometimes more. The key cache is fairly tiny for the amount of | |
| # time it saves, so it's worthwhile to use it at large numbers. | |
| # The row cache saves even more time, but must contain the entire row, | |
| # so it is extremely space-intensive. It's best to only use the | |
| # row cache if you have hot rows or static rows. | |
| # | |
| # NOTE: if you reduce the size, you may not get you hottest keys loaded on startup. | |
| # | |
| # Default value is empty to make it "auto" (min(5% of Heap (in MB), 100MB)). Set to 0 to disable key cache. | |
| key_cache_size_in_mb: | |
| # Duration in seconds after which Cassandra should | |
| # save the key cache. Caches are saved to saved_caches_directory as | |
| # specified in this configuration file. | |
| # | |
| # Saved caches greatly improve cold-start speeds, and is relatively cheap in | |
| # terms of I/O for the key cache. Row cache saving is much more expensive and | |
| # has limited use. | |
| # | |
| # Default is 14400 or 4 hours. | |
| key_cache_save_period: 14400 | |
| # Number of keys from the key cache to save | |
| # Disabled by default, meaning all keys are going to be saved | |
| # key_cache_keys_to_save: 100 | |
| # Row cache implementation class name. | |
| # Available implementations: | |
| # org.apache.cassandra.cache.OHCProvider Fully off-heap row cache implementation (default). | |
| # org.apache.cassandra.cache.SerializingCacheProvider This is the row cache implementation availabile | |
| # in previous releases of Cassandra. | |
| # row_cache_class_name: org.apache.cassandra.cache.OHCProvider | |
| # Maximum size of the row cache in memory. | |
| # Please note that OHC cache implementation requires some additional off-heap memory to manage | |
| # the map structures and some in-flight memory during operations before/after cache entries can be | |
| # accounted against the cache capacity. This overhead is usually small compared to the whole capacity. | |
| # Do not specify more memory that the system can afford in the worst usual situation and leave some | |
| # headroom for OS block level cache. Do never allow your system to swap. | |
| # | |
| # Default value is 0, to disable row caching. | |
| row_cache_size_in_mb: 0 | |
| # Duration in seconds after which Cassandra should save the row cache. | |
| # Caches are saved to saved_caches_directory as specified in this configuration file. | |
| # | |
| # Saved caches greatly improve cold-start speeds, and is relatively cheap in | |
| # terms of I/O for the key cache. Row cache saving is much more expensive and | |
| # has limited use. | |
| # | |
| # Default is 0 to disable saving the row cache. | |
| row_cache_save_period: 0 | |
| # Number of keys from the row cache to save. | |
| # Specify 0 (which is the default), meaning all keys are going to be saved | |
| # row_cache_keys_to_save: 100 | |
| # Maximum size of the counter cache in memory. | |
| # | |
| # Counter cache helps to reduce counter locks' contention for hot counter cells. | |
| # In case of RF = 1 a counter cache hit will cause Cassandra to skip the read before | |
| # write entirely. With RF > 1 a counter cache hit will still help to reduce the duration | |
| # of the lock hold, helping with hot counter cell updates, but will not allow skipping | |
| # the read entirely. Only the local (clock, count) tuple of a counter cell is kept | |
| # in memory, not the whole counter, so it's relatively cheap. | |
| # | |
| # NOTE: if you reduce the size, you may not get you hottest keys loaded on startup. | |
| # | |
| # Default value is empty to make it "auto" (min(2.5% of Heap (in MB), 50MB)). Set to 0 to disable counter cache. | |
| # NOTE: if you perform counter deletes and rely on low gcgs, you should disable the counter cache. | |
| counter_cache_size_in_mb: | |
| # Duration in seconds after which Cassandra should | |
| # save the counter cache (keys only). Caches are saved to saved_caches_directory as | |
| # specified in this configuration file. | |
| # | |
| # Default is 7200 or 2 hours. | |
| counter_cache_save_period: 7200 | |
| # Number of keys from the counter cache to save | |
| # Disabled by default, meaning all keys are going to be saved | |
| # counter_cache_keys_to_save: 100 | |
| # saved caches | |
| # If not set, the default directory is $CASSANDRA_HOME/data/saved_caches. | |
| saved_caches_directory: /var/lib/cassandra/saved_caches | |
| # commitlog_sync may be either "periodic" or "batch." | |
| # | |
| # When in batch mode, Cassandra won't ack writes until the commit log | |
| # has been fsynced to disk. It will wait | |
| # commitlog_sync_batch_window_in_ms milliseconds between fsyncs. | |
| # This window should be kept short because the writer threads will | |
| # be unable to do extra work while waiting. (You may need to increase | |
| # concurrent_writes for the same reason.) | |
| # | |
| # commitlog_sync: batch | |
| # commitlog_sync_batch_window_in_ms: 2 | |
| # | |
| # the other option is "periodic" where writes may be acked immediately | |
| # and the CommitLog is simply synced every commitlog_sync_period_in_ms | |
| # milliseconds. | |
| commitlog_sync: periodic | |
| commitlog_sync_period_in_ms: 10000 | |
| # The size of the individual commitlog file segments. A commitlog | |
| # segment may be archived, deleted, or recycled once all the data | |
| # in it (potentially from each columnfamily in the system) has been | |
| # flushed to sstables. | |
| # | |
| # The default size is 32, which is almost always fine, but if you are | |
| # archiving commitlog segments (see commitlog_archiving.properties), | |
| # then you probably want a finer granularity of archiving; 8 or 16 MB | |
| # is reasonable. | |
| commitlog_segment_size_in_mb: 32 | |
| # Compression to apply to the commit log. If omitted, the commit log | |
| # will be written uncompressed. LZ4, Snappy, and Deflate compressors | |
| # are supported. | |
| #commitlog_compression: | |
| # - class_name: LZ4Compressor | |
| # parameters: | |
| # - | |
| # any class that implements the SeedProvider interface and has a | |
| # constructor that takes a Map<String, String> of parameters will do. | |
| seed_provider: | |
| # Addresses of hosts that are deemed contact points. | |
| # Cassandra nodes use this list of hosts to find each other and learn | |
| # the topology of the ring. You must change this if you are running | |
| # multiple nodes! | |
| - class_name: org.apache.cassandra.locator.SimpleSeedProvider | |
| parameters: | |
| # seeds is actually a comma-delimited list of addresses. | |
| # Ex: "<ip1>,<ip2>,<ip3>" | |
| - seeds: "127.0.1.1" | |
| # For workloads with more data than can fit in memory, Cassandra's | |
| # bottleneck will be reads that need to fetch data from | |
| # disk. "concurrent_reads" should be set to (16 * number_of_drives) in | |
| # order to allow the operations to enqueue low enough in the stack | |
| # that the OS and drives can reorder them. Same applies to | |
| # "concurrent_counter_writes", since counter writes read the current | |
| # values before incrementing and writing them back. | |
| # | |
| # On the other hand, since writes are almost never IO bound, the ideal | |
| # number of "concurrent_writes" is dependent on the number of cores in | |
| # your system; (8 * number_of_cores) is a good rule of thumb. | |
| concurrent_reads: 32 | |
| concurrent_writes: 32 | |
| concurrent_counter_writes: 32 | |
| # Total memory to use for sstable-reading buffers. Defaults to | |
| # the smaller of 1/4 of heap or 512MB. | |
| # file_cache_size_in_mb: 512 | |
| # Total permitted memory to use for memtables. Cassandra will stop | |
| # accepting writes when the limit is exceeded until a flush completes, | |
| # and will trigger a flush based on memtable_cleanup_threshold | |
| # If omitted, Cassandra will set both to 1/4 the size of the heap. | |
| # memtable_heap_space_in_mb: 2048 | |
| # memtable_offheap_space_in_mb: 2048 | |
| # Ratio of occupied non-flushing memtable size to total permitted size | |
| # that will trigger a flush of the largest memtable. Larger mct will | |
| # mean larger flushes and hence less compaction, but also less concurrent | |
| # flush activity which can make it difficult to keep your disks fed | |
| # under heavy write load. | |
| # | |
| # memtable_cleanup_threshold defaults to 1 / (memtable_flush_writers + 1) | |
| # memtable_cleanup_threshold: 0.11 | |
| # Specify the way Cassandra allocates and manages memtable memory. | |
| # Options are: | |
| # heap_buffers: on heap nio buffers | |
| # offheap_buffers: off heap (direct) nio buffers | |
| # offheap_objects: native memory, eliminating nio buffer heap overhead | |
| memtable_allocation_type: heap_buffers | |
| # Total space to use for commit logs on disk. | |
| # | |
| # If space gets above this value, Cassandra will flush every dirty CF | |
| # in the oldest segment and remove it. So a small total commitlog space | |
| # will tend to cause more flush activity on less-active columnfamilies. | |
| # | |
| # The default value is the smaller of 8192, and 1/4 of the total space | |
| # of the commitlog volume. | |
| # | |
| # commitlog_total_space_in_mb: 8192 | |
| # This sets the amount of memtable flush writer threads. These will | |
| # be blocked by disk io, and each one will hold a memtable in memory | |
| # while blocked. | |
| # | |
| # memtable_flush_writers defaults to the smaller of (number of disks, | |
| # number of cores), with a minimum of 2 and a maximum of 8. | |
| # | |
| # If your data directories are backed by SSD, you should increase this | |
| # to the number of cores. | |
| #memtable_flush_writers: 8 | |
| # A fixed memory pool size in MB for for SSTable index summaries. If left | |
| # empty, this will default to 5% of the heap size. If the memory usage of | |
| # all index summaries exceeds this limit, SSTables with low read rates will | |
| # shrink their index summaries in order to meet this limit. However, this | |
| # is a best-effort process. In extreme conditions Cassandra may need to use | |
| # more than this amount of memory. | |
| index_summary_capacity_in_mb: | |
| # How frequently index summaries should be resampled. This is done | |
| # periodically to redistribute memory from the fixed-size pool to sstables | |
| # proportional their recent read rates. Setting to -1 will disable this | |
| # process, leaving existing index summaries at their current sampling level. | |
| index_summary_resize_interval_in_minutes: 60 | |
| # Whether to, when doing sequential writing, fsync() at intervals in | |
| # order to force the operating system to flush the dirty | |
| # buffers. Enable this to avoid sudden dirty buffer flushing from | |
| # impacting read latencies. Almost always a good idea on SSDs; not | |
| # necessarily on platters. | |
| trickle_fsync: false | |
| trickle_fsync_interval_in_kb: 10240 | |
| # TCP port, for commands and data | |
| # For security reasons, you should not expose this port to the internet. Firewall it if needed. | |
| storage_port: 7000 | |
| # SSL port, for encrypted communication. Unused unless enabled in | |
| # encryption_options | |
| # For security reasons, you should not expose this port to the internet. Firewall it if needed. | |
| ssl_storage_port: 7001 | |
| # Address or interface to bind to and tell other Cassandra nodes to connect to. | |
| # You _must_ change this if you want multiple nodes to be able to communicate! | |
| # | |
| # Set listen_address OR listen_interface, not both. Interfaces must correspond | |
| # to a single address, IP aliasing is not supported. | |
| # | |
| # Leaving it blank leaves it up to InetAddress.getLocalHost(). This | |
| # will always do the Right Thing _if_ the node is properly configured | |
| # (hostname, name resolution, etc), and the Right Thing is to use the | |
| # address associated with the hostname (it might not be). | |
| # | |
| # Setting listen_address to 0.0.0.0 is always wrong. | |
| # | |
| # If you choose to specify the interface by name and the interface has an ipv4 and an ipv6 address | |
| # you can specify which should be chosen using listen_interface_prefer_ipv6. If false the first ipv4 | |
| # address will be used. If true the first ipv6 address will be used. Defaults to false preferring | |
| # ipv4. If there is only one address it will be selected regardless of ipv4/ipv6. | |
| listen_address: 127.0.1.1 | |
| # listen_interface: eth0 | |
| # listen_interface_prefer_ipv6: false | |
| # Address to broadcast to other Cassandra nodes | |
| # Leaving this blank will set it to the same value as listen_address | |
| broadcast_address: 127.0.1.1 | |
| # When using multiple physical network interfaces, set this | |
| # to true to listen on broadcast_address in addition to | |
| # the listen_address, allowing nodes to communicate in both | |
| # interfaces. | |
| # Ignore this property if the network configuration automatically | |
| # routes between the public and private networks such as EC2. | |
| # listen_on_broadcast_address: false | |
| # Internode authentication backend, implementing IInternodeAuthenticator; | |
| # used to allow/disallow connections from peer nodes. | |
| # internode_authenticator: org.apache.cassandra.auth.AllowAllInternodeAuthenticator | |
| # Whether to start the native transport server. | |
| # Please note that the address on which the native transport is bound is the | |
| # same as the rpc_address. The port however is different and specified below. | |
| start_native_transport: true | |
| # port for the CQL native transport to listen for clients on | |
| # For security reasons, you should not expose this port to the internet. Firewall it if needed. | |
| native_transport_port: 9042 | |
| # The maximum threads for handling requests when the native transport is used. | |
| # This is similar to rpc_max_threads though the default differs slightly (and | |
| # there is no native_transport_min_threads, idle threads will always be stopped | |
| # after 30 seconds). | |
| # native_transport_max_threads: 128 | |
| # | |
| # The maximum size of allowed frame. Frame (requests) larger than this will | |
| # be rejected as invalid. The default is 256MB. | |
| # native_transport_max_frame_size_in_mb: 256 | |
| # The maximum number of concurrent client connections. | |
| # The default is -1, which means unlimited. | |
| # native_transport_max_concurrent_connections: -1 | |
| # The maximum number of concurrent client connections per source ip. | |
| # The default is -1, which means unlimited. | |
| # native_transport_max_concurrent_connections_per_ip: -1 | |
| # Whether to start the thrift rpc server. | |
| start_rpc: false | |
| # The address or interface to bind the Thrift RPC service and native transport | |
| # server to. | |
| # | |
| # Set rpc_address OR rpc_interface, not both. Interfaces must correspond | |
| # to a single address, IP aliasing is not supported. | |
| # | |
| # Leaving rpc_address blank has the same effect as on listen_address | |
| # (i.e. it will be based on the configured hostname of the node). | |
| # | |
| # Note that unlike listen_address, you can specify 0.0.0.0, but you must also | |
| # set broadcast_rpc_address to a value other than 0.0.0.0. | |
| # | |
| # For security reasons, you should not expose this port to the internet. Firewall it if needed. | |
| # | |
| # If you choose to specify the interface by name and the interface has an ipv4 and an ipv6 address | |
| # you can specify which should be chosen using rpc_interface_prefer_ipv6. If false the first ipv4 | |
| # address will be used. If true the first ipv6 address will be used. Defaults to false preferring | |
| # ipv4. If there is only one address it will be selected regardless of ipv4/ipv6. | |
| rpc_address: 0.0.0.0 | |
| # rpc_interface: eth1 | |
| # rpc_interface_prefer_ipv6: false | |
| # port for Thrift to listen for clients on | |
| rpc_port: 9160 | |
| # RPC address to broadcast to drivers and other Cassandra nodes. This cannot | |
| # be set to 0.0.0.0. If left blank, this will be set to the value of | |
| # rpc_address. If rpc_address is set to 0.0.0.0, broadcast_rpc_address must | |
| # be set. | |
| broadcast_rpc_address: 127.0.1.1 | |
| # enable or disable keepalive on rpc/native connections | |
| rpc_keepalive: true | |
| # Cassandra provides two out-of-the-box options for the RPC Server: | |
| # | |
| # sync -> One thread per thrift connection. For a very large number of clients, memory | |
| # will be your limiting factor. On a 64 bit JVM, 180KB is the minimum stack size | |
| # per thread, and that will correspond to your use of virtual memory (but physical memory | |
| # may be limited depending on use of stack space). | |
| # | |
| # hsha -> Stands for "half synchronous, half asynchronous." All thrift clients are handled | |
| # asynchronously using a small number of threads that does not vary with the amount | |
| # of thrift clients (and thus scales well to many clients). The rpc requests are still | |
| # synchronous (one thread per active request). If hsha is selected then it is essential | |
| # that rpc_max_threads is changed from the default value of unlimited. | |
| # | |
| # The default is sync because on Windows hsha is about 30% slower. On Linux, | |
| # sync/hsha performance is about the same, with hsha of course using less memory. | |
| # | |
| # Alternatively, can provide your own RPC server by providing the fully-qualified class name | |
| # of an o.a.c.t.TServerFactory that can create an instance of it. | |
| rpc_server_type: sync | |
| # Uncomment rpc_min|max_thread to set request pool size limits. | |
| # | |
| # Regardless of your choice of RPC server (see above), the number of maximum requests in the | |
| # RPC thread pool dictates how many concurrent requests are possible (but if you are using the sync | |
| # RPC server, it also dictates the number of clients that can be connected at all). | |
| # | |
| # The default is unlimited and thus provides no protection against clients overwhelming the server. You are | |
| # encouraged to set a maximum that makes sense for you in production, but do keep in mind that | |
| # rpc_max_threads represents the maximum number of client requests this server may execute concurrently. | |
| # | |
| # rpc_min_threads: 16 | |
| # rpc_max_threads: 2048 | |
| # uncomment to set socket buffer sizes on rpc connections | |
| # rpc_send_buff_size_in_bytes: | |
| # rpc_recv_buff_size_in_bytes: | |
| # Uncomment to set socket buffer size for internode communication | |
| # Note that when setting this, the buffer size is limited by net.core.wmem_max | |
| # and when not setting it it is defined by net.ipv4.tcp_wmem | |
| # See: | |
| # /proc/sys/net/core/wmem_max | |
| # /proc/sys/net/core/rmem_max | |
| # /proc/sys/net/ipv4/tcp_wmem | |
| # /proc/sys/net/ipv4/tcp_wmem | |
| # and: man tcp | |
| # internode_send_buff_size_in_bytes: | |
| # internode_recv_buff_size_in_bytes: | |
| # Frame size for thrift (maximum message length). | |
| thrift_framed_transport_size_in_mb: 15 | |
| # Set to true to have Cassandra create a hard link to each sstable | |
| # flushed or streamed locally in a backups/ subdirectory of the | |
| # keyspace data. Removing these links is the operator's | |
| # responsibility. | |
| incremental_backups: false | |
| # Whether or not to take a snapshot before each compaction. Be | |
| # careful using this option, since Cassandra won't clean up the | |
| # snapshots for you. Mostly useful if you're paranoid when there | |
| # is a data format change. | |
| snapshot_before_compaction: false | |
| # Whether or not a snapshot is taken of the data before keyspace truncation | |
| # or dropping of column families. The STRONGLY advised default of true | |
| # should be used to provide data safety. If you set this flag to false, you will | |
| # lose data on truncation or drop. | |
| auto_snapshot: true | |
| # When executing a scan, within or across a partition, we need to keep the | |
| # tombstones seen in memory so we can return them to the coordinator, which | |
| # will use them to make sure other replicas also know about the deleted rows. | |
| # With workloads that generate a lot of tombstones, this can cause performance | |
| # problems and even exaust the server heap. | |
| # (http://www.datastax.com/dev/blog/cassandra-anti-patterns-queues-and-queue-like-datasets) | |
| # Adjust the thresholds here if you understand the dangers and want to | |
| # scan more tombstones anyway. These thresholds may also be adjusted at runtime | |
| # using the StorageService mbean. | |
| tombstone_warn_threshold: 1000 | |
| tombstone_failure_threshold: 100000 | |
| # Granularity of the collation index of rows within a partition. | |
| # Increase if your rows are large, or if you have a very large | |
| # number of rows per partition. The competing goals are these: | |
| # 1) a smaller granularity means more index entries are generated | |
| # and looking up rows withing the partition by collation column | |
| # is faster | |
| # 2) but, Cassandra will keep the collation index in memory for hot | |
| # rows (as part of the key cache), so a larger granularity means | |
| # you can cache more hot rows | |
| column_index_size_in_kb: 64 | |
| # Log WARN on any batch size exceeding this value. 5kb per batch by default. | |
| # Caution should be taken on increasing the size of this threshold as it can lead to node instability. | |
| batch_size_warn_threshold_in_kb: 5 | |
| # Fail any batch exceeding this value. 50kb (10x warn threshold) by default. | |
| batch_size_fail_threshold_in_kb: 50 | |
| # Number of simultaneous compactions to allow, NOT including | |
| # validation "compactions" for anti-entropy repair. Simultaneous | |
| # compactions can help preserve read performance in a mixed read/write | |
| # workload, by mitigating the tendency of small sstables to accumulate | |
| # during a single long running compactions. The default is usually | |
| # fine and if you experience problems with compaction running too | |
| # slowly or too fast, you should look at | |
| # compaction_throughput_mb_per_sec first. | |
| # | |
| # concurrent_compactors defaults to the smaller of (number of disks, | |
| # number of cores), with a minimum of 2 and a maximum of 8. | |
| # | |
| # If your data directories are backed by SSD, you should increase this | |
| # to the number of cores. | |
| #concurrent_compactors: 1 | |
| # Throttles compaction to the given total throughput across the entire | |
| # system. The faster you insert data, the faster you need to compact in | |
| # order to keep the sstable count down, but in general, setting this to | |
| # 16 to 32 times the rate you are inserting data is more than sufficient. | |
| # Setting this to 0 disables throttling. Note that this account for all types | |
| # of compaction, including validation compaction. | |
| compaction_throughput_mb_per_sec: 16 | |
| # Log a warning when compacting partitions larger than this value | |
| compaction_large_partition_warning_threshold_mb: 100 | |
| # When compacting, the replacement sstable(s) can be opened before they | |
| # are completely written, and used in place of the prior sstables for | |
| # any range that has been written. This helps to smoothly transfer reads | |
| # between the sstables, reducing page cache churn and keeping hot rows hot | |
| sstable_preemptive_open_interval_in_mb: 50 | |
| # Throttles all outbound streaming file transfers on this node to the | |
| # given total throughput in Mbps. This is necessary because Cassandra does | |
| # mostly sequential IO when streaming data during bootstrap or repair, which | |
| # can lead to saturating the network connection and degrading rpc performance. | |
| # When unset, the default is 200 Mbps or 25 MB/s. | |
| # stream_throughput_outbound_megabits_per_sec: 200 | |
| # Throttles all streaming file transfer between the datacenters, | |
| # this setting allows users to throttle inter dc stream throughput in addition | |
| # to throttling all network stream traffic as configured with | |
| # stream_throughput_outbound_megabits_per_sec | |
| # When unset, the default is 200 Mbps or 25 MB/s | |
| # inter_dc_stream_throughput_outbound_megabits_per_sec: 200 | |
| # How long the coordinator should wait for read operations to complete | |
| read_request_timeout_in_ms: 5000 | |
| # How long the coordinator should wait for seq or index scans to complete | |
| range_request_timeout_in_ms: 10000 | |
| # How long the coordinator should wait for writes to complete | |
| write_request_timeout_in_ms: 2000 | |
| # How long the coordinator should wait for counter writes to complete | |
| counter_write_request_timeout_in_ms: 5000 | |
| # How long a coordinator should continue to retry a CAS operation | |
| # that contends with other proposals for the same row | |
| cas_contention_timeout_in_ms: 1000 | |
| # How long the coordinator should wait for truncates to complete | |
| # (This can be much longer, because unless auto_snapshot is disabled | |
| # we need to flush first so we can snapshot before removing the data.) | |
| truncate_request_timeout_in_ms: 60000 | |
| # The default timeout for other, miscellaneous operations | |
| request_timeout_in_ms: 10000 | |
| # Enable operation timeout information exchange between nodes to accurately | |
| # measure request timeouts. If disabled, replicas will assume that requests | |
| # were forwarded to them instantly by the coordinator, which means that | |
| # under overload conditions we will waste that much extra time processing | |
| # already-timed-out requests. | |
| # | |
| # Warning: before enabling this property make sure to ntp is installed | |
| # and the times are synchronized between the nodes. | |
| cross_node_timeout: false | |
| # Enable socket timeout for streaming operation. | |
| # When a timeout occurs during streaming, streaming is retried from the start | |
| # of the current file. This _can_ involve re-streaming an important amount of | |
| # data, so you should avoid setting the value too low. | |
| # Default value is 3600000, which means streams timeout after an hour. | |
| # streaming_socket_timeout_in_ms: 3600000 | |
| # phi value that must be reached for a host to be marked down. | |
| # most users should never need to adjust this. | |
| # phi_convict_threshold: 8 | |
| # endpoint_snitch -- Set this to a class that implements | |
| # IEndpointSnitch. The snitch has two functions: | |
| # - it teaches Cassandra enough about your network topology to route | |
| # requests efficiently | |
| # - it allows Cassandra to spread replicas around your cluster to avoid | |
| # correlated failures. It does this by grouping machines into | |
| # "datacenters" and "racks." Cassandra will do its best not to have | |
| # more than one replica on the same "rack" (which may not actually | |
| # be a physical location) | |
| # | |
| # IF YOU CHANGE THE SNITCH AFTER DATA IS INSERTED INTO THE CLUSTER, | |
| # YOU MUST RUN A FULL REPAIR, SINCE THE SNITCH AFFECTS WHERE REPLICAS | |
| # ARE PLACED. | |
| # | |
| # IF THE RACK A REPLICA IS PLACED IN CHANGES AFTER THE REPLICA HAS BEEN | |
| # ADDED TO A RING, THE NODE MUST BE DECOMMISSIONED AND REBOOTSTRAPPED. | |
| # | |
| # Out of the box, Cassandra provides | |
| # - SimpleSnitch: | |
| # Treats Strategy order as proximity. This can improve cache | |
| # locality when disabling read repair. Only appropriate for | |
| # single-datacenter deployments. | |
| # - GossipingPropertyFileSnitch | |
| # This should be your go-to snitch for production use. The rack | |
| # and datacenter for the local node are defined in | |
| # cassandra-rackdc.properties and propagated to other nodes via | |
| # gossip. If cassandra-topology.properties exists, it is used as a | |
| # fallback, allowing migration from the PropertyFileSnitch. | |
| # - PropertyFileSnitch: | |
| # Proximity is determined by rack and data center, which are | |
| # explicitly configured in cassandra-topology.properties. | |
| # - Ec2Snitch: | |
| # Appropriate for EC2 deployments in a single Region. Loads Region | |
| # and Availability Zone information from the EC2 API. The Region is | |
| # treated as the datacenter, and the Availability Zone as the rack. | |
| # Only private IPs are used, so this will not work across multiple | |
| # Regions. | |
| # - Ec2MultiRegionSnitch: | |
| # Uses public IPs as broadcast_address to allow cross-region | |
| # connectivity. (Thus, you should set seed addresses to the public | |
| # IP as well.) You will need to open the storage_port or | |
| # ssl_storage_port on the public IP firewall. (For intra-Region | |
| # traffic, Cassandra will switch to the private IP after | |
| # establishing a connection.) | |
| # - RackInferringSnitch: | |
| # Proximity is determined by rack and data center, which are | |
| # assumed to correspond to the 3rd and 2nd octet of each node's IP | |
| # address, respectively. Unless this happens to match your | |
| # deployment conventions, this is best used as an example of | |
| # writing a custom Snitch class and is provided in that spirit. | |
| # | |
| # You can use a custom Snitch by setting this to the full class name | |
| # of the snitch, which will be assumed to be on your classpath. | |
| endpoint_snitch: SimpleSnitch | |
| # controls how often to perform the more expensive part of host score | |
| # calculation | |
| dynamic_snitch_update_interval_in_ms: 100 | |
| # controls how often to reset all host scores, allowing a bad host to | |
| # possibly recover | |
| dynamic_snitch_reset_interval_in_ms: 600000 | |
| # if set greater than zero and read_repair_chance is < 1.0, this will allow | |
| # 'pinning' of replicas to hosts in order to increase cache capacity. | |
| # The badness threshold will control how much worse the pinned host has to be | |
| # before the dynamic snitch will prefer other replicas over it. This is | |
| # expressed as a double which represents a percentage. Thus, a value of | |
| # 0.2 means Cassandra would continue to prefer the static snitch values | |
| # until the pinned host was 20% worse than the fastest. | |
| dynamic_snitch_badness_threshold: 0.1 | |
| # request_scheduler -- Set this to a class that implements | |
| # RequestScheduler, which will schedule incoming client requests | |
| # according to the specific policy. This is useful for multi-tenancy | |
| # with a single Cassandra cluster. | |
| # NOTE: This is specifically for requests from the client and does | |
| # not affect inter node communication. | |
| # org.apache.cassandra.scheduler.NoScheduler - No scheduling takes place | |
| # org.apache.cassandra.scheduler.RoundRobinScheduler - Round robin of | |
| # client requests to a node with a separate queue for each | |
| # request_scheduler_id. The scheduler is further customized by | |
| # request_scheduler_options as described below. | |
| request_scheduler: org.apache.cassandra.scheduler.NoScheduler | |
| # Scheduler Options vary based on the type of scheduler | |
| # NoScheduler - Has no options | |
| # RoundRobin | |
| # - throttle_limit -- The throttle_limit is the number of in-flight | |
| # requests per client. Requests beyond | |
| # that limit are queued up until | |
| # running requests can complete. | |
| # The value of 80 here is twice the number of | |
| # concurrent_reads + concurrent_writes. | |
| # - default_weight -- default_weight is optional and allows for | |
| # overriding the default which is 1. | |
| # - weights -- Weights are optional and will default to 1 or the | |
| # overridden default_weight. The weight translates into how | |
| # many requests are handled during each turn of the | |
| # RoundRobin, based on the scheduler id. | |
| # | |
| # request_scheduler_options: | |
| # throttle_limit: 80 | |
| # default_weight: 5 | |
| # weights: | |
| # Keyspace1: 1 | |
| # Keyspace2: 5 | |
| # request_scheduler_id -- An identifier based on which to perform | |
| # the request scheduling. Currently the only valid option is keyspace. | |
| # request_scheduler_id: keyspace | |
| # Enable or disable inter-node encryption | |
| # Default settings are TLS v1, RSA 1024-bit keys (it is imperative that | |
| # users generate their own keys) TLS_RSA_WITH_AES_128_CBC_SHA as the cipher | |
| # suite for authentication, key exchange and encryption of the actual data transfers. | |
| # Use the DHE/ECDHE ciphers if running in FIPS 140 compliant mode. | |
| # NOTE: No custom encryption options are enabled at the moment | |
| # The available internode options are : all, none, dc, rack | |
| # | |
| # If set to dc cassandra will encrypt the traffic between the DCs | |
| # If set to rack cassandra will encrypt the traffic between the racks | |
| # | |
| # The passwords used in these options must match the passwords used when generating | |
| # the keystore and truststore. For instructions on generating these files, see: | |
| # http://download.oracle.com/javase/6/docs/technotes/guides/security/jsse/JSSERefGuide.html#CreateKeystore | |
| # | |
| server_encryption_options: | |
| internode_encryption: none | |
| keystore: conf/.keystore | |
| keystore_password: cassandra | |
| truststore: conf/.truststore | |
| truststore_password: cassandra | |
| # More advanced defaults below: | |
| # protocol: TLS | |
| # algorithm: SunX509 | |
| # store_type: JKS | |
| # cipher_suites: [TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_DHE_RSA_WITH_AES_128_CBC_SHA,TLS_DHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA] | |
| # require_client_auth: false | |
| # enable or disable client/server encryption. | |
| client_encryption_options: | |
| enabled: false | |
| # If enabled and optional is set to true encrypted and unencrypted connections are handled. | |
| optional: false | |
| keystore: conf/.keystore | |
| keystore_password: cassandra | |
| # require_client_auth: false | |
| # Set trustore and truststore_password if require_client_auth is true | |
| # truststore: conf/.truststore | |
| # truststore_password: cassandra | |
| # More advanced defaults below: | |
| # protocol: TLS | |
| # algorithm: SunX509 | |
| # store_type: JKS | |
| # cipher_suites: [TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_DHE_RSA_WITH_AES_128_CBC_SHA,TLS_DHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA] | |
| # internode_compression controls whether traffic between nodes is | |
| # compressed. | |
| # can be: all - all traffic is compressed | |
| # dc - traffic between different datacenters is compressed | |
| # none - nothing is compressed. | |
| internode_compression: all | |
| # Enable or disable tcp_nodelay for inter-dc communication. | |
| # Disabling it will result in larger (but fewer) network packets being sent, | |
| # reducing overhead from the TCP protocol itself, at the cost of increasing | |
| # latency if you block for cross-datacenter responses. | |
| inter_dc_tcp_nodelay: false | |
| # TTL for different trace types used during logging of the repair process. | |
| tracetype_query_ttl: 86400 | |
| tracetype_repair_ttl: 604800 | |
| # GC Pauses greater than gc_warn_threshold_in_ms will be logged at WARN level | |
| # Adjust the threshold based on your application throughput requirement | |
| # By default, Cassandra logs GC Pauses greater than 200 ms at INFO level | |
| # gc_warn_threshold_in_ms: 1000 | |
| # UDFs (user defined functions) are disabled by default. | |
| # As of Cassandra 2.2, there is no security manager or anything else in place that | |
| # prevents execution of evil code. CASSANDRA-9402 will fix this issue for Cassandra 3.0. | |
| # This will inherently be backwards-incompatible with any 2.2 UDF that perform insecure | |
| # operations such as opening a socket or writing to the filesystem. | |
| enable_user_defined_functions: false | |
| # The default Windows kernel timer and scheduling resolution is 15.6ms for power conservation. | |
| # Lowering this value on Windows can provide much tighter latency and better throughput, however | |
| # some virtualized environments may see a negative performance impact from changing this setting | |
| # below their system default. The sysinternals 'clockres' tool can confirm your system's default | |
| # setting. | |
| windows_timer_interval: 1 |
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| # Cassandra storage config YAML | |
| # NOTE: | |
| # See http://wiki.apache.org/cassandra/StorageConfiguration for | |
| # full explanations of configuration directives | |
| # /NOTE | |
| # The name of the cluster. This is mainly used to prevent machines in | |
| # one logical cluster from joining another. | |
| cluster_name: 'Test Cluster' | |
| # This defines the number of tokens randomly assigned to this node on the ring | |
| # The more tokens, relative to other nodes, the larger the proportion of data | |
| # that this node will store. You probably want all nodes to have the same number | |
| # of tokens assuming they have equal hardware capability. | |
| # | |
| # If you leave this unspecified, Cassandra will use the default of 1 token for legacy compatibility, | |
| # and will use the initial_token as described below. | |
| # | |
| # Specifying initial_token will override this setting on the node's initial start, | |
| # on subsequent starts, this setting will apply even if initial token is set. | |
| # | |
| # If you already have a cluster with 1 token per node, and wish to migrate to | |
| # multiple tokens per node, see http://wiki.apache.org/cassandra/Operations | |
| num_tokens: 256 | |
| # Triggers automatic allocation of num_tokens tokens for this node. The allocation | |
| # algorithm attempts to choose tokens in a way that optimizes replicated load over | |
| # the nodes in the datacenter for the replication strategy used by the specified | |
| # keyspace. | |
| # | |
| # The load assigned to each node will be close to proportional to its number of | |
| # vnodes. | |
| # | |
| # Only supported with the Murmur3Partitioner. | |
| # allocate_tokens_for_keyspace: KEYSPACE | |
| # initial_token allows you to specify tokens manually. While you can use # it with | |
| # vnodes (num_tokens > 1, above) -- in which case you should provide a | |
| # comma-separated list -- it's primarily used when adding nodes # to legacy clusters | |
| # that do not have vnodes enabled. | |
| # initial_token: | |
| # See http://wiki.apache.org/cassandra/HintedHandoff | |
| # May either be "true" or "false" to enable globally | |
| hinted_handoff_enabled: true | |
| # When hinted_handoff_enabled is true, a black list of data centers that will not | |
| # perform hinted handoff | |
| #hinted_handoff_disabled_datacenters: | |
| # - DC1 | |
| # - DC2 | |
| # this defines the maximum amount of time a dead host will have hints | |
| # generated. After it has been dead this long, new hints for it will not be | |
| # created until it has been seen alive and gone down again. | |
| max_hint_window_in_ms: 10800000 # 3 hours | |
| # Maximum throttle in KBs per second, per delivery thread. This will be | |
| # reduced proportionally to the number of nodes in the cluster. (If there | |
| # are two nodes in the cluster, each delivery thread will use the maximum | |
| # rate; if there are three, each will throttle to half of the maximum, | |
| # since we expect two nodes to be delivering hints simultaneously.) | |
| hinted_handoff_throttle_in_kb: 1024 | |
| # Number of threads with which to deliver hints; | |
| # Consider increasing this number when you have multi-dc deployments, since | |
| # cross-dc handoff tends to be slower | |
| max_hints_delivery_threads: 2 | |
| # Directory where Cassandra should store hints. | |
| # If not set, the default directory is $CASSANDRA_HOME/data/hints. | |
| # hints_directory: /var/lib/cassandra/hints | |
| # How often hints should be flushed from the internal buffers to disk. | |
| # Will *not* trigger fsync. | |
| hints_flush_period_in_ms: 10000 | |
| # Maximum size for a single hints file, in megabytes. | |
| max_hints_file_size_in_mb: 128 | |
| # Compression to apply to the hint files. If omitted, hints files | |
| # will be written uncompressed. LZ4, Snappy, and Deflate compressors | |
| # are supported. | |
| #hints_compression: | |
| # - class_name: LZ4Compressor | |
| # parameters: | |
| # - | |
| # Maximum throttle in KBs per second, total. This will be | |
| # reduced proportionally to the number of nodes in the cluster. | |
| batchlog_replay_throttle_in_kb: 1024 | |
| # Authentication backend, implementing IAuthenticator; used to identify users | |
| # Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthenticator, | |
| # PasswordAuthenticator}. | |
| # | |
| # - AllowAllAuthenticator performs no checks - set it to disable authentication. | |
| # - PasswordAuthenticator relies on username/password pairs to authenticate | |
| # users. It keeps usernames and hashed passwords in system_auth.credentials table. | |
| # Please increase system_auth keyspace replication factor if you use this authenticator. | |
| # If using PasswordAuthenticator, CassandraRoleManager must also be used (see below) | |
| authenticator: AllowAllAuthenticator | |
| # Authorization backend, implementing IAuthorizer; used to limit access/provide permissions | |
| # Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthorizer, | |
| # CassandraAuthorizer}. | |
| # | |
| # - AllowAllAuthorizer allows any action to any user - set it to disable authorization. | |
| # - CassandraAuthorizer stores permissions in system_auth.permissions table. Please | |
| # increase system_auth keyspace replication factor if you use this authorizer. | |
| authorizer: AllowAllAuthorizer | |
| # Part of the Authentication & Authorization backend, implementing IRoleManager; used | |
| # to maintain grants and memberships between roles. | |
| # Out of the box, Cassandra provides org.apache.cassandra.auth.CassandraRoleManager, | |
| # which stores role information in the system_auth keyspace. Most functions of the | |
| # IRoleManager require an authenticated login, so unless the configured IAuthenticator | |
| # actually implements authentication, most of this functionality will be unavailable. | |
| # | |
| # - CassandraRoleManager stores role data in the system_auth keyspace. Please | |
| # increase system_auth keyspace replication factor if you use this role manager. | |
| role_manager: CassandraRoleManager | |
| # Validity period for roles cache (fetching permissions can be an | |
| # expensive operation depending on the authorizer). Granted roles are cached for | |
| # authenticated sessions in AuthenticatedUser and after the period specified | |
| # here, become eligible for (async) reload. | |
| # Defaults to 2000, set to 0 to disable. | |
| # Will be disabled automatically for AllowAllAuthenticator. | |
| roles_validity_in_ms: 2000 | |
| # Refresh interval for roles cache (if enabled). | |
| # After this interval, cache entries become eligible for refresh. Upon next | |
| # access, an async reload is scheduled and the old value returned until it | |
| # completes. If roles_validity_in_ms is non-zero, then this must be | |
| # also. | |
| # Defaults to the same value as roles_validity_in_ms. | |
| # roles_update_interval_in_ms: 1000 | |
| # Validity period for permissions cache (fetching permissions can be an | |
| # expensive operation depending on the authorizer, CassandraAuthorizer is | |
| # one example). Defaults to 2000, set to 0 to disable. | |
| # Will be disabled automatically for AllowAllAuthorizer. | |
| permissions_validity_in_ms: 2000 | |
| # Refresh interval for permissions cache (if enabled). | |
| # After this interval, cache entries become eligible for refresh. Upon next | |
| # access, an async reload is scheduled and the old value returned until it | |
| # completes. If permissions_validity_in_ms is non-zero, then this must be | |
| # also. | |
| # Defaults to the same value as permissions_validity_in_ms. | |
| # permissions_update_interval_in_ms: 1000 | |
| # The partitioner is responsible for distributing groups of rows (by | |
| # partition key) across nodes in the cluster. You should leave this | |
| # alone for new clusters. The partitioner can NOT be changed without | |
| # reloading all data, so when upgrading you should set this to the | |
| # same partitioner you were already using. | |
| # | |
| # Besides Murmur3Partitioner, partitioners included for backwards | |
| # compatibility include RandomPartitioner, ByteOrderedPartitioner, and | |
| # OrderPreservingPartitioner. | |
| # | |
| partitioner: org.apache.cassandra.dht.Murmur3Partitioner | |
| # Directories where Cassandra should store data on disk. Cassandra | |
| # will spread data evenly across them, subject to the granularity of | |
| # the configured compaction strategy. | |
| # If not set, the default directory is $CASSANDRA_HOME/data/data. | |
| data_file_directories: | |
| - /var/lib/cassandra/data | |
| # commit log. when running on magnetic HDD, this should be a | |
| # separate spindle than the data directories. | |
| # If not set, the default directory is $CASSANDRA_HOME/data/commitlog. | |
| commitlog_directory: /var/lib/cassandra/commitlog | |
| # policy for data disk failures: | |
| # die: shut down gossip and client transports and kill the JVM for any fs errors or | |
| # single-sstable errors, so the node can be replaced. | |
| # stop_paranoid: shut down gossip and client transports even for single-sstable errors, | |
| # kill the JVM for errors during startup. | |
| # stop: shut down gossip and client transports, leaving the node effectively dead, but | |
| # can still be inspected via JMX, kill the JVM for errors during startup. | |
| # best_effort: stop using the failed disk and respond to requests based on | |
| # remaining available sstables. This means you WILL see obsolete | |
| # data at CL.ONE! | |
| # ignore: ignore fatal errors and let requests fail, as in pre-1.2 Cassandra | |
| disk_failure_policy: stop | |
| # policy for commit disk failures: | |
| # die: shut down gossip and Thrift and kill the JVM, so the node can be replaced. | |
| # stop: shut down gossip and Thrift, leaving the node effectively dead, but | |
| # can still be inspected via JMX. | |
| # stop_commit: shutdown the commit log, letting writes collect but | |
| # continuing to service reads, as in pre-2.0.5 Cassandra | |
| # ignore: ignore fatal errors and let the batches fail | |
| commit_failure_policy: stop | |
| # Maximum size of the key cache in memory. | |
| # | |
| # Each key cache hit saves 1 seek and each row cache hit saves 2 seeks at the | |
| # minimum, sometimes more. The key cache is fairly tiny for the amount of | |
| # time it saves, so it's worthwhile to use it at large numbers. | |
| # The row cache saves even more time, but must contain the entire row, | |
| # so it is extremely space-intensive. It's best to only use the | |
| # row cache if you have hot rows or static rows. | |
| # | |
| # NOTE: if you reduce the size, you may not get you hottest keys loaded on startup. | |
| # | |
| # Default value is empty to make it "auto" (min(5% of Heap (in MB), 100MB)). Set to 0 to disable key cache. | |
| key_cache_size_in_mb: | |
| # Duration in seconds after which Cassandra should | |
| # save the key cache. Caches are saved to saved_caches_directory as | |
| # specified in this configuration file. | |
| # | |
| # Saved caches greatly improve cold-start speeds, and is relatively cheap in | |
| # terms of I/O for the key cache. Row cache saving is much more expensive and | |
| # has limited use. | |
| # | |
| # Default is 14400 or 4 hours. | |
| key_cache_save_period: 14400 | |
| # Number of keys from the key cache to save | |
| # Disabled by default, meaning all keys are going to be saved | |
| # key_cache_keys_to_save: 100 | |
| # Row cache implementation class name. | |
| # Available implementations: | |
| # org.apache.cassandra.cache.OHCProvider Fully off-heap row cache implementation (default). | |
| # org.apache.cassandra.cache.SerializingCacheProvider This is the row cache implementation availabile | |
| # in previous releases of Cassandra. | |
| # row_cache_class_name: org.apache.cassandra.cache.OHCProvider | |
| # Maximum size of the row cache in memory. | |
| # Please note that OHC cache implementation requires some additional off-heap memory to manage | |
| # the map structures and some in-flight memory during operations before/after cache entries can be | |
| # accounted against the cache capacity. This overhead is usually small compared to the whole capacity. | |
| # Do not specify more memory that the system can afford in the worst usual situation and leave some | |
| # headroom for OS block level cache. Do never allow your system to swap. | |
| # | |
| # Default value is 0, to disable row caching. | |
| row_cache_size_in_mb: 0 | |
| # Duration in seconds after which Cassandra should save the row cache. | |
| # Caches are saved to saved_caches_directory as specified in this configuration file. | |
| # | |
| # Saved caches greatly improve cold-start speeds, and is relatively cheap in | |
| # terms of I/O for the key cache. Row cache saving is much more expensive and | |
| # has limited use. | |
| # | |
| # Default is 0 to disable saving the row cache. | |
| row_cache_save_period: 0 | |
| # Number of keys from the row cache to save. | |
| # Specify 0 (which is the default), meaning all keys are going to be saved | |
| # row_cache_keys_to_save: 100 | |
| # Maximum size of the counter cache in memory. | |
| # | |
| # Counter cache helps to reduce counter locks' contention for hot counter cells. | |
| # In case of RF = 1 a counter cache hit will cause Cassandra to skip the read before | |
| # write entirely. With RF > 1 a counter cache hit will still help to reduce the duration | |
| # of the lock hold, helping with hot counter cell updates, but will not allow skipping | |
| # the read entirely. Only the local (clock, count) tuple of a counter cell is kept | |
| # in memory, not the whole counter, so it's relatively cheap. | |
| # | |
| # NOTE: if you reduce the size, you may not get you hottest keys loaded on startup. | |
| # | |
| # Default value is empty to make it "auto" (min(2.5% of Heap (in MB), 50MB)). Set to 0 to disable counter cache. | |
| # NOTE: if you perform counter deletes and rely on low gcgs, you should disable the counter cache. | |
| counter_cache_size_in_mb: | |
| # Duration in seconds after which Cassandra should | |
| # save the counter cache (keys only). Caches are saved to saved_caches_directory as | |
| # specified in this configuration file. | |
| # | |
| # Default is 7200 or 2 hours. | |
| counter_cache_save_period: 7200 | |
| # Number of keys from the counter cache to save | |
| # Disabled by default, meaning all keys are going to be saved | |
| # counter_cache_keys_to_save: 100 | |
| # saved caches | |
| # If not set, the default directory is $CASSANDRA_HOME/data/saved_caches. | |
| saved_caches_directory: /var/lib/cassandra/saved_caches | |
| # commitlog_sync may be either "periodic" or "batch." | |
| # | |
| # When in batch mode, Cassandra won't ack writes until the commit log | |
| # has been fsynced to disk. It will wait | |
| # commitlog_sync_batch_window_in_ms milliseconds between fsyncs. | |
| # This window should be kept short because the writer threads will | |
| # be unable to do extra work while waiting. (You may need to increase | |
| # concurrent_writes for the same reason.) | |
| # | |
| # commitlog_sync: batch | |
| # commitlog_sync_batch_window_in_ms: 2 | |
| # | |
| # the other option is "periodic" where writes may be acked immediately | |
| # and the CommitLog is simply synced every commitlog_sync_period_in_ms | |
| # milliseconds. | |
| commitlog_sync: periodic | |
| commitlog_sync_period_in_ms: 10000 | |
| # The size of the individual commitlog file segments. A commitlog | |
| # segment may be archived, deleted, or recycled once all the data | |
| # in it (potentially from each columnfamily in the system) has been | |
| # flushed to sstables. | |
| # | |
| # The default size is 32, which is almost always fine, but if you are | |
| # archiving commitlog segments (see commitlog_archiving.properties), | |
| # then you probably want a finer granularity of archiving; 8 or 16 MB | |
| # is reasonable. | |
| # Max mutation size is also configurable via max_mutation_size_in_kb setting in | |
| # cassandra.yaml. The default is half the size commitlog_segment_size_in_mb * 1024. | |
| # | |
| # NOTE: If max_mutation_size_in_kb is set explicitly then commitlog_segment_size_in_mb must | |
| # be set to at least twice the size of max_mutation_size_in_kb / 1024 | |
| # | |
| commitlog_segment_size_in_mb: 32 | |
| # Compression to apply to the commit log. If omitted, the commit log | |
| # will be written uncompressed. LZ4, Snappy, and Deflate compressors | |
| # are supported. | |
| #commitlog_compression: | |
| # - class_name: LZ4Compressor | |
| # parameters: | |
| # - | |
| # any class that implements the SeedProvider interface and has a | |
| # constructor that takes a Map<String, String> of parameters will do. | |
| seed_provider: | |
| # Addresses of hosts that are deemed contact points. | |
| # Cassandra nodes use this list of hosts to find each other and learn | |
| # the topology of the ring. You must change this if you are running | |
| # multiple nodes! | |
| - class_name: org.apache.cassandra.locator.SimpleSeedProvider | |
| parameters: | |
| # seeds is actually a comma-delimited list of addresses. | |
| # Ex: "<ip1>,<ip2>,<ip3>" | |
| - seeds: "127.0.1.1" | |
| # For workloads with more data than can fit in memory, Cassandra's | |
| # bottleneck will be reads that need to fetch data from | |
| # disk. "concurrent_reads" should be set to (16 * number_of_drives) in | |
| # order to allow the operations to enqueue low enough in the stack | |
| # that the OS and drives can reorder them. Same applies to | |
| # "concurrent_counter_writes", since counter writes read the current | |
| # values before incrementing and writing them back. | |
| # | |
| # On the other hand, since writes are almost never IO bound, the ideal | |
| # number of "concurrent_writes" is dependent on the number of cores in | |
| # your system; (8 * number_of_cores) is a good rule of thumb. | |
| concurrent_reads: 32 | |
| concurrent_writes: 32 | |
| concurrent_counter_writes: 32 | |
| # For materialized view writes, as there is a read involved, so this should | |
| # be limited by the less of concurrent reads or concurrent writes. | |
| concurrent_materialized_view_writes: 32 | |
| # Maximum memory to use for pooling sstable buffers. Defaults to the smaller | |
| # of 1/4 of heap or 512MB. This pool is allocated off-heap, so is in addition | |
| # to the memory allocated for heap. Memory is only allocated as needed. | |
| # file_cache_size_in_mb: 512 | |
| # Flag indicating whether to allocate on or off heap when the sstable buffer | |
| # pool is exhausted, that is when it has exceeded the maximum memory | |
| # file_cache_size_in_mb, beyond which it will not cache buffers but allocate on request. | |
| # buffer_pool_use_heap_if_exhausted: true | |
| # The strategy for optimizing disk read | |
| # Possible values are: | |
| # ssd (for solid state disks, the default) | |
| # spinning (for spinning disks) | |
| # disk_optimization_strategy: ssd | |
| # Total permitted memory to use for memtables. Cassandra will stop | |
| # accepting writes when the limit is exceeded until a flush completes, | |
| # and will trigger a flush based on memtable_cleanup_threshold | |
| # If omitted, Cassandra will set both to 1/4 the size of the heap. | |
| # memtable_heap_space_in_mb: 2048 | |
| # memtable_offheap_space_in_mb: 2048 | |
| # Ratio of occupied non-flushing memtable size to total permitted size | |
| # that will trigger a flush of the largest memtable. Larger mct will | |
| # mean larger flushes and hence less compaction, but also less concurrent | |
| # flush activity which can make it difficult to keep your disks fed | |
| # under heavy write load. | |
| # | |
| # memtable_cleanup_threshold defaults to 1 / (memtable_flush_writers + 1) | |
| # memtable_cleanup_threshold: 0.11 | |
| # Specify the way Cassandra allocates and manages memtable memory. | |
| # Options are: | |
| # heap_buffers: on heap nio buffers | |
| # offheap_buffers: off heap (direct) nio buffers | |
| memtable_allocation_type: heap_buffers | |
| # Total space to use for commit logs on disk. | |
| # | |
| # If space gets above this value, Cassandra will flush every dirty CF | |
| # in the oldest segment and remove it. So a small total commitlog space | |
| # will tend to cause more flush activity on less-active columnfamilies. | |
| # | |
| # The default value is the smaller of 8192, and 1/4 of the total space | |
| # of the commitlog volume. | |
| # | |
| # commitlog_total_space_in_mb: 8192 | |
| # This sets the amount of memtable flush writer threads. These will | |
| # be blocked by disk io, and each one will hold a memtable in memory | |
| # while blocked. | |
| # | |
| # memtable_flush_writers defaults to one per data_file_directory. | |
| # | |
| # If your data directories are backed by SSD, you can increase this, but | |
| # avoid having memtable_flush_writers * data_file_directories > number of cores | |
| #memtable_flush_writers: 1 | |
| # A fixed memory pool size in MB for for SSTable index summaries. If left | |
| # empty, this will default to 5% of the heap size. If the memory usage of | |
| # all index summaries exceeds this limit, SSTables with low read rates will | |
| # shrink their index summaries in order to meet this limit. However, this | |
| # is a best-effort process. In extreme conditions Cassandra may need to use | |
| # more than this amount of memory. | |
| index_summary_capacity_in_mb: | |
| # How frequently index summaries should be resampled. This is done | |
| # periodically to redistribute memory from the fixed-size pool to sstables | |
| # proportional their recent read rates. Setting to -1 will disable this | |
| # process, leaving existing index summaries at their current sampling level. | |
| index_summary_resize_interval_in_minutes: 60 | |
| # Whether to, when doing sequential writing, fsync() at intervals in | |
| # order to force the operating system to flush the dirty | |
| # buffers. Enable this to avoid sudden dirty buffer flushing from | |
| # impacting read latencies. Almost always a good idea on SSDs; not | |
| # necessarily on platters. | |
| trickle_fsync: false | |
| trickle_fsync_interval_in_kb: 10240 | |
| # TCP port, for commands and data | |
| # For security reasons, you should not expose this port to the internet. Firewall it if needed. | |
| storage_port: 7000 | |
| # SSL port, for encrypted communication. Unused unless enabled in | |
| # encryption_options | |
| # For security reasons, you should not expose this port to the internet. Firewall it if needed. | |
| ssl_storage_port: 7001 | |
| # Address or interface to bind to and tell other Cassandra nodes to connect to. | |
| # You _must_ change this if you want multiple nodes to be able to communicate! | |
| # | |
| # Set listen_address OR listen_interface, not both. Interfaces must correspond | |
| # to a single address, IP aliasing is not supported. | |
| # | |
| # Leaving it blank leaves it up to InetAddress.getLocalHost(). This | |
| # will always do the Right Thing _if_ the node is properly configured | |
| # (hostname, name resolution, etc), and the Right Thing is to use the | |
| # address associated with the hostname (it might not be). | |
| # | |
| # Setting listen_address to 0.0.0.0 is always wrong. | |
| # | |
| # If you choose to specify the interface by name and the interface has an ipv4 and an ipv6 address | |
| # you can specify which should be chosen using listen_interface_prefer_ipv6. If false the first ipv4 | |
| # address will be used. If true the first ipv6 address will be used. Defaults to false preferring | |
| # ipv4. If there is only one address it will be selected regardless of ipv4/ipv6. | |
| listen_address: 127.0.1.1 | |
| # listen_interface: eth0 | |
| # listen_interface_prefer_ipv6: false | |
| # Address to broadcast to other Cassandra nodes | |
| # Leaving this blank will set it to the same value as listen_address | |
| broadcast_address: 127.0.1.1 | |
| # When using multiple physical network interfaces, set this | |
| # to true to listen on broadcast_address in addition to | |
| # the listen_address, allowing nodes to communicate in both | |
| # interfaces. | |
| # Ignore this property if the network configuration automatically | |
| # routes between the public and private networks such as EC2. | |
| # listen_on_broadcast_address: false | |
| # Internode authentication backend, implementing IInternodeAuthenticator; | |
| # used to allow/disallow connections from peer nodes. | |
| # internode_authenticator: org.apache.cassandra.auth.AllowAllInternodeAuthenticator | |
| # Whether to start the native transport server. | |
| # Please note that the address on which the native transport is bound is the | |
| # same as the rpc_address. The port however is different and specified below. | |
| start_native_transport: true | |
| # port for the CQL native transport to listen for clients on | |
| # For security reasons, you should not expose this port to the internet. Firewall it if needed. | |
| native_transport_port: 9042 | |
| # Enabling native transport encryption in client_encryption_options allows you to either use | |
| # encryption for the standard port or to use a dedicated, additional port along with the unencrypted | |
| # standard native_transport_port. | |
| # Enabling client encryption and keeping native_transport_port_ssl disabled will use encryption | |
| # for native_transport_port. Setting native_transport_port_ssl to a different value | |
| # from native_transport_port will use encryption for native_transport_port_ssl while | |
| # keeping native_transport_port unencrypted. | |
| # native_transport_port_ssl: 9142 | |
| # The maximum threads for handling requests when the native transport is used. | |
| # This is similar to rpc_max_threads though the default differs slightly (and | |
| # there is no native_transport_min_threads, idle threads will always be stopped | |
| # after 30 seconds). | |
| # native_transport_max_threads: 128 | |
| # | |
| # The maximum size of allowed frame. Frame (requests) larger than this will | |
| # be rejected as invalid. The default is 256MB. | |
| # native_transport_max_frame_size_in_mb: 256 | |
| # The maximum number of concurrent client connections. | |
| # The default is -1, which means unlimited. | |
| # native_transport_max_concurrent_connections: -1 | |
| # The maximum number of concurrent client connections per source ip. | |
| # The default is -1, which means unlimited. | |
| # native_transport_max_concurrent_connections_per_ip: -1 | |
| # Whether to start the thrift rpc server. | |
| start_rpc: false | |
| # The address or interface to bind the Thrift RPC service and native transport | |
| # server to. | |
| # | |
| # Set rpc_address OR rpc_interface, not both. Interfaces must correspond | |
| # to a single address, IP aliasing is not supported. | |
| # | |
| # Leaving rpc_address blank has the same effect as on listen_address | |
| # (i.e. it will be based on the configured hostname of the node). | |
| # | |
| # Note that unlike listen_address, you can specify 0.0.0.0, but you must also | |
| # set broadcast_rpc_address to a value other than 0.0.0.0. | |
| # | |
| # For security reasons, you should not expose this port to the internet. Firewall it if needed. | |
| # | |
| # If you choose to specify the interface by name and the interface has an ipv4 and an ipv6 address | |
| # you can specify which should be chosen using rpc_interface_prefer_ipv6. If false the first ipv4 | |
| # address will be used. If true the first ipv6 address will be used. Defaults to false preferring | |
| # ipv4. If there is only one address it will be selected regardless of ipv4/ipv6. | |
| rpc_address: 0.0.0.0 | |
| # rpc_interface: eth1 | |
| # rpc_interface_prefer_ipv6: false | |
| # port for Thrift to listen for clients on | |
| rpc_port: 9160 | |
| # RPC address to broadcast to drivers and other Cassandra nodes. This cannot | |
| # be set to 0.0.0.0. If left blank, this will be set to the value of | |
| # rpc_address. If rpc_address is set to 0.0.0.0, broadcast_rpc_address must | |
| # be set. | |
| broadcast_rpc_address: 127.0.1.1 | |
| # enable or disable keepalive on rpc/native connections | |
| rpc_keepalive: true | |
| # Cassandra provides two out-of-the-box options for the RPC Server: | |
| # | |
| # sync -> One thread per thrift connection. For a very large number of clients, memory | |
| # will be your limiting factor. On a 64 bit JVM, 180KB is the minimum stack size | |
| # per thread, and that will correspond to your use of virtual memory (but physical memory | |
| # may be limited depending on use of stack space). | |
| # | |
| # hsha -> Stands for "half synchronous, half asynchronous." All thrift clients are handled | |
| # asynchronously using a small number of threads that does not vary with the amount | |
| # of thrift clients (and thus scales well to many clients). The rpc requests are still | |
| # synchronous (one thread per active request). If hsha is selected then it is essential | |
| # that rpc_max_threads is changed from the default value of unlimited. | |
| # | |
| # The default is sync because on Windows hsha is about 30% slower. On Linux, | |
| # sync/hsha performance is about the same, with hsha of course using less memory. | |
| # | |
| # Alternatively, can provide your own RPC server by providing the fully-qualified class name | |
| # of an o.a.c.t.TServerFactory that can create an instance of it. | |
| rpc_server_type: sync | |
| # Uncomment rpc_min|max_thread to set request pool size limits. | |
| # | |
| # Regardless of your choice of RPC server (see above), the number of maximum requests in the | |
| # RPC thread pool dictates how many concurrent requests are possible (but if you are using the sync | |
| # RPC server, it also dictates the number of clients that can be connected at all). | |
| # | |
| # The default is unlimited and thus provides no protection against clients overwhelming the server. You are | |
| # encouraged to set a maximum that makes sense for you in production, but do keep in mind that | |
| # rpc_max_threads represents the maximum number of client requests this server may execute concurrently. | |
| # | |
| # rpc_min_threads: 16 | |
| # rpc_max_threads: 2048 | |
| # uncomment to set socket buffer sizes on rpc connections | |
| # rpc_send_buff_size_in_bytes: | |
| # rpc_recv_buff_size_in_bytes: | |
| # Uncomment to set socket buffer size for internode communication | |
| # Note that when setting this, the buffer size is limited by net.core.wmem_max | |
| # and when not setting it it is defined by net.ipv4.tcp_wmem | |
| # See: | |
| # /proc/sys/net/core/wmem_max | |
| # /proc/sys/net/core/rmem_max | |
| # /proc/sys/net/ipv4/tcp_wmem | |
| # /proc/sys/net/ipv4/tcp_wmem | |
| # and: man tcp | |
| # internode_send_buff_size_in_bytes: | |
| # internode_recv_buff_size_in_bytes: | |
| # Frame size for thrift (maximum message length). | |
| thrift_framed_transport_size_in_mb: 15 | |
| # Set to true to have Cassandra create a hard link to each sstable | |
| # flushed or streamed locally in a backups/ subdirectory of the | |
| # keyspace data. Removing these links is the operator's | |
| # responsibility. | |
| incremental_backups: false | |
| # Whether or not to take a snapshot before each compaction. Be | |
| # careful using this option, since Cassandra won't clean up the | |
| # snapshots for you. Mostly useful if you're paranoid when there | |
| # is a data format change. | |
| snapshot_before_compaction: false | |
| # Whether or not a snapshot is taken of the data before keyspace truncation | |
| # or dropping of column families. The STRONGLY advised default of true | |
| # should be used to provide data safety. If you set this flag to false, you will | |
| # lose data on truncation or drop. | |
| auto_snapshot: true | |
| # When executing a scan, within or across a partition, we need to keep the | |
| # tombstones seen in memory so we can return them to the coordinator, which | |
| # will use them to make sure other replicas also know about the deleted rows. | |
| # With workloads that generate a lot of tombstones, this can cause performance | |
| # problems and even exaust the server heap. | |
| # (http://www.datastax.com/dev/blog/cassandra-anti-patterns-queues-and-queue-like-datasets) | |
| # Adjust the thresholds here if you understand the dangers and want to | |
| # scan more tombstones anyway. These thresholds may also be adjusted at runtime | |
| # using the StorageService mbean. | |
| tombstone_warn_threshold: 1000 | |
| tombstone_failure_threshold: 100000 | |
| # Granularity of the collation index of rows within a partition. | |
| # Increase if your rows are large, or if you have a very large | |
| # number of rows per partition. The competing goals are these: | |
| # 1) a smaller granularity means more index entries are generated | |
| # and looking up rows withing the partition by collation column | |
| # is faster | |
| # 2) but, Cassandra will keep the collation index in memory for hot | |
| # rows (as part of the key cache), so a larger granularity means | |
| # you can cache more hot rows | |
| column_index_size_in_kb: 64 | |
| # Log WARN on any batch size exceeding this value. 5kb per batch by default. | |
| # Caution should be taken on increasing the size of this threshold as it can lead to node instability. | |
| batch_size_warn_threshold_in_kb: 5 | |
| # Fail any batch exceeding this value. 50kb (10x warn threshold) by default. | |
| batch_size_fail_threshold_in_kb: 50 | |
| # Number of simultaneous compactions to allow, NOT including | |
| # validation "compactions" for anti-entropy repair. Simultaneous | |
| # compactions can help preserve read performance in a mixed read/write | |
| # workload, by mitigating the tendency of small sstables to accumulate | |
| # during a single long running compactions. The default is usually | |
| # fine and if you experience problems with compaction running too | |
| # slowly or too fast, you should look at | |
| # compaction_throughput_mb_per_sec first. | |
| # | |
| # concurrent_compactors defaults to the smaller of (number of disks, | |
| # number of cores), with a minimum of 2 and a maximum of 8. | |
| # | |
| # If your data directories are backed by SSD, you should increase this | |
| # to the number of cores. | |
| #concurrent_compactors: 1 | |
| # Throttles compaction to the given total throughput across the entire | |
| # system. The faster you insert data, the faster you need to compact in | |
| # order to keep the sstable count down, but in general, setting this to | |
| # 16 to 32 times the rate you are inserting data is more than sufficient. | |
| # Setting this to 0 disables throttling. Note that this account for all types | |
| # of compaction, including validation compaction. | |
| compaction_throughput_mb_per_sec: 16 | |
| # Log a warning when compacting partitions larger than this value | |
| compaction_large_partition_warning_threshold_mb: 100 | |
| # When compacting, the replacement sstable(s) can be opened before they | |
| # are completely written, and used in place of the prior sstables for | |
| # any range that has been written. This helps to smoothly transfer reads | |
| # between the sstables, reducing page cache churn and keeping hot rows hot | |
| sstable_preemptive_open_interval_in_mb: 50 | |
| # Throttles all outbound streaming file transfers on this node to the | |
| # given total throughput in Mbps. This is necessary because Cassandra does | |
| # mostly sequential IO when streaming data during bootstrap or repair, which | |
| # can lead to saturating the network connection and degrading rpc performance. | |
| # When unset, the default is 200 Mbps or 25 MB/s. | |
| # stream_throughput_outbound_megabits_per_sec: 200 | |
| # Throttles all streaming file transfer between the datacenters, | |
| # this setting allows users to throttle inter dc stream throughput in addition | |
| # to throttling all network stream traffic as configured with | |
| # stream_throughput_outbound_megabits_per_sec | |
| # When unset, the default is 200 Mbps or 25 MB/s | |
| # inter_dc_stream_throughput_outbound_megabits_per_sec: 200 | |
| # How long the coordinator should wait for read operations to complete | |
| read_request_timeout_in_ms: 5000 | |
| # How long the coordinator should wait for seq or index scans to complete | |
| range_request_timeout_in_ms: 10000 | |
| # How long the coordinator should wait for writes to complete | |
| write_request_timeout_in_ms: 2000 | |
| # How long the coordinator should wait for counter writes to complete | |
| counter_write_request_timeout_in_ms: 5000 | |
| # How long a coordinator should continue to retry a CAS operation | |
| # that contends with other proposals for the same row | |
| cas_contention_timeout_in_ms: 1000 | |
| # How long the coordinator should wait for truncates to complete | |
| # (This can be much longer, because unless auto_snapshot is disabled | |
| # we need to flush first so we can snapshot before removing the data.) | |
| truncate_request_timeout_in_ms: 60000 | |
| # The default timeout for other, miscellaneous operations | |
| request_timeout_in_ms: 10000 | |
| # Enable operation timeout information exchange between nodes to accurately | |
| # measure request timeouts. If disabled, replicas will assume that requests | |
| # were forwarded to them instantly by the coordinator, which means that | |
| # under overload conditions we will waste that much extra time processing | |
| # already-timed-out requests. | |
| # | |
| # Warning: before enabling this property make sure to ntp is installed | |
| # and the times are synchronized between the nodes. | |
| cross_node_timeout: false | |
| # Enable socket timeout for streaming operation. | |
| # When a timeout occurs during streaming, streaming is retried from the start | |
| # of the current file. This _can_ involve re-streaming an important amount of | |
| # data, so you should avoid setting the value too low. | |
| # Default value is 3600000, which means streams timeout after an hour. | |
| # streaming_socket_timeout_in_ms: 3600000 | |
| # phi value that must be reached for a host to be marked down. | |
| # most users should never need to adjust this. | |
| # phi_convict_threshold: 8 | |
| # endpoint_snitch -- Set this to a class that implements | |
| # IEndpointSnitch. The snitch has two functions: | |
| # - it teaches Cassandra enough about your network topology to route | |
| # requests efficiently | |
| # - it allows Cassandra to spread replicas around your cluster to avoid | |
| # correlated failures. It does this by grouping machines into | |
| # "datacenters" and "racks." Cassandra will do its best not to have | |
| # more than one replica on the same "rack" (which may not actually | |
| # be a physical location) | |
| # | |
| # IF YOU CHANGE THE SNITCH AFTER DATA IS INSERTED INTO THE CLUSTER, | |
| # YOU MUST RUN A FULL REPAIR, SINCE THE SNITCH AFFECTS WHERE REPLICAS | |
| # ARE PLACED. | |
| # | |
| # IF THE RACK A REPLICA IS PLACED IN CHANGES AFTER THE REPLICA HAS BEEN | |
| # ADDED TO A RING, THE NODE MUST BE DECOMMISSIONED AND REBOOTSTRAPPED. | |
| # | |
| # Out of the box, Cassandra provides | |
| # - SimpleSnitch: | |
| # Treats Strategy order as proximity. This can improve cache | |
| # locality when disabling read repair. Only appropriate for | |
| # single-datacenter deployments. | |
| # - GossipingPropertyFileSnitch | |
| # This should be your go-to snitch for production use. The rack | |
| # and datacenter for the local node are defined in | |
| # cassandra-rackdc.properties and propagated to other nodes via | |
| # gossip. If cassandra-topology.properties exists, it is used as a | |
| # fallback, allowing migration from the PropertyFileSnitch. | |
| # - PropertyFileSnitch: | |
| # Proximity is determined by rack and data center, which are | |
| # explicitly configured in cassandra-topology.properties. | |
| # - Ec2Snitch: | |
| # Appropriate for EC2 deployments in a single Region. Loads Region | |
| # and Availability Zone information from the EC2 API. The Region is | |
| # treated as the datacenter, and the Availability Zone as the rack. | |
| # Only private IPs are used, so this will not work across multiple | |
| # Regions. | |
| # - Ec2MultiRegionSnitch: | |
| # Uses public IPs as broadcast_address to allow cross-region | |
| # connectivity. (Thus, you should set seed addresses to the public | |
| # IP as well.) You will need to open the storage_port or | |
| # ssl_storage_port on the public IP firewall. (For intra-Region | |
| # traffic, Cassandra will switch to the private IP after | |
| # establishing a connection.) | |
| # - RackInferringSnitch: | |
| # Proximity is determined by rack and data center, which are | |
| # assumed to correspond to the 3rd and 2nd octet of each node's IP | |
| # address, respectively. Unless this happens to match your | |
| # deployment conventions, this is best used as an example of | |
| # writing a custom Snitch class and is provided in that spirit. | |
| # | |
| # You can use a custom Snitch by setting this to the full class name | |
| # of the snitch, which will be assumed to be on your classpath. | |
| endpoint_snitch: SimpleSnitch | |
| # controls how often to perform the more expensive part of host score | |
| # calculation | |
| dynamic_snitch_update_interval_in_ms: 100 | |
| # controls how often to reset all host scores, allowing a bad host to | |
| # possibly recover | |
| dynamic_snitch_reset_interval_in_ms: 600000 | |
| # if set greater than zero and read_repair_chance is < 1.0, this will allow | |
| # 'pinning' of replicas to hosts in order to increase cache capacity. | |
| # The badness threshold will control how much worse the pinned host has to be | |
| # before the dynamic snitch will prefer other replicas over it. This is | |
| # expressed as a double which represents a percentage. Thus, a value of | |
| # 0.2 means Cassandra would continue to prefer the static snitch values | |
| # until the pinned host was 20% worse than the fastest. | |
| dynamic_snitch_badness_threshold: 0.1 | |
| # request_scheduler -- Set this to a class that implements | |
| # RequestScheduler, which will schedule incoming client requests | |
| # according to the specific policy. This is useful for multi-tenancy | |
| # with a single Cassandra cluster. | |
| # NOTE: This is specifically for requests from the client and does | |
| # not affect inter node communication. | |
| # org.apache.cassandra.scheduler.NoScheduler - No scheduling takes place | |
| # org.apache.cassandra.scheduler.RoundRobinScheduler - Round robin of | |
| # client requests to a node with a separate queue for each | |
| # request_scheduler_id. The scheduler is further customized by | |
| # request_scheduler_options as described below. | |
| request_scheduler: org.apache.cassandra.scheduler.NoScheduler | |
| # Scheduler Options vary based on the type of scheduler | |
| # NoScheduler - Has no options | |
| # RoundRobin | |
| # - throttle_limit -- The throttle_limit is the number of in-flight | |
| # requests per client. Requests beyond | |
| # that limit are queued up until | |
| # running requests can complete. | |
| # The value of 80 here is twice the number of | |
| # concurrent_reads + concurrent_writes. | |
| # - default_weight -- default_weight is optional and allows for | |
| # overriding the default which is 1. | |
| # - weights -- Weights are optional and will default to 1 or the | |
| # overridden default_weight. The weight translates into how | |
| # many requests are handled during each turn of the | |
| # RoundRobin, based on the scheduler id. | |
| # | |
| # request_scheduler_options: | |
| # throttle_limit: 80 | |
| # default_weight: 5 | |
| # weights: | |
| # Keyspace1: 1 | |
| # Keyspace2: 5 | |
| # request_scheduler_id -- An identifier based on which to perform | |
| # the request scheduling. Currently the only valid option is keyspace. | |
| # request_scheduler_id: keyspace | |
| # Enable or disable inter-node encryption | |
| # Default settings are TLS v1, RSA 1024-bit keys (it is imperative that | |
| # users generate their own keys) TLS_RSA_WITH_AES_128_CBC_SHA as the cipher | |
| # suite for authentication, key exchange and encryption of the actual data transfers. | |
| # Use the DHE/ECDHE ciphers if running in FIPS 140 compliant mode. | |
| # NOTE: No custom encryption options are enabled at the moment | |
| # The available internode options are : all, none, dc, rack | |
| # | |
| # If set to dc cassandra will encrypt the traffic between the DCs | |
| # If set to rack cassandra will encrypt the traffic between the racks | |
| # | |
| # The passwords used in these options must match the passwords used when generating | |
| # the keystore and truststore. For instructions on generating these files, see: | |
| # http://download.oracle.com/javase/6/docs/technotes/guides/security/jsse/JSSERefGuide.html#CreateKeystore | |
| # | |
| server_encryption_options: | |
| internode_encryption: none | |
| keystore: conf/.keystore | |
| keystore_password: cassandra | |
| truststore: conf/.truststore | |
| truststore_password: cassandra | |
| # More advanced defaults below: | |
| # protocol: TLS | |
| # algorithm: SunX509 | |
| # store_type: JKS | |
| # cipher_suites: [TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_DHE_RSA_WITH_AES_128_CBC_SHA,TLS_DHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA] | |
| # require_client_auth: false | |
| # enable or disable client/server encryption. | |
| client_encryption_options: | |
| enabled: false | |
| # If enabled and optional is set to true encrypted and unencrypted connections are handled. | |
| optional: false | |
| keystore: conf/.keystore | |
| keystore_password: cassandra | |
| # require_client_auth: false | |
| # Set trustore and truststore_password if require_client_auth is true | |
| # truststore: conf/.truststore | |
| # truststore_password: cassandra | |
| # More advanced defaults below: | |
| # protocol: TLS | |
| # algorithm: SunX509 | |
| # store_type: JKS | |
| # cipher_suites: [TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_DHE_RSA_WITH_AES_128_CBC_SHA,TLS_DHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA] | |
| # internode_compression controls whether traffic between nodes is | |
| # compressed. | |
| # can be: all - all traffic is compressed | |
| # dc - traffic between different datacenters is compressed | |
| # none - nothing is compressed. | |
| internode_compression: all | |
| # Enable or disable tcp_nodelay for inter-dc communication. | |
| # Disabling it will result in larger (but fewer) network packets being sent, | |
| # reducing overhead from the TCP protocol itself, at the cost of increasing | |
| # latency if you block for cross-datacenter responses. | |
| inter_dc_tcp_nodelay: false | |
| # TTL for different trace types used during logging of the repair process. | |
| tracetype_query_ttl: 86400 | |
| tracetype_repair_ttl: 604800 | |
| # GC Pauses greater than gc_warn_threshold_in_ms will be logged at WARN level | |
| # Adjust the threshold based on your application throughput requirement | |
| # By default, Cassandra logs GC Pauses greater than 200 ms at INFO level | |
| gc_warn_threshold_in_ms: 1000 | |
| # UDFs (user defined functions) are disabled by default. | |
| # As of Cassandra 3.0 there is a sandbox in place that should prevent execution of evil code. | |
| enable_user_defined_functions: false | |
| # Enables scripted UDFs (JavaScript UDFs). | |
| # Java UDFs are always enabled, if enable_user_defined_functions is true. | |
| # Enable this option to be able to use UDFs with "language javascript" or any custom JSR-223 provider. | |
| # This option has no effect, if enable_user_defined_functions is false. | |
| enable_scripted_user_defined_functions: false | |
| # The default Windows kernel timer and scheduling resolution is 15.6ms for power conservation. | |
| # Lowering this value on Windows can provide much tighter latency and better throughput, however | |
| # some virtualized environments may see a negative performance impact from changing this setting | |
| # below their system default. The sysinternals 'clockres' tool can confirm your system's default | |
| # setting. | |
| windows_timer_interval: 1 |
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| ########################################################################### | |
| # jvm.options # | |
| # # | |
| # - all flags defined here will be used by cassandra to startup the JVM # | |
| # - one flag should be specified per line # | |
| # - lines that do not start with '-' will be ignored # | |
| # - only static flags are accepted (no variables or parameters) # | |
| # - dynamic flags will be appended to these on cassandra-env # | |
| ########################################################################### | |
| ###################### | |
| # STARTUP PARAMETERS # | |
| ###################### | |
| # Uncomment any of the following properties to enable specific startup parameters | |
| # In a multi-instance deployment, multiple Cassandra instances will independently assume that all | |
| # CPU processors are available to it. This setting allows you to specify a smaller set of processors | |
| # and perhaps have affinity. | |
| #-Dcassandra.available_processors=number_of_processors | |
| # The directory location of the cassandra.yaml file. | |
| #-Dcassandra.config=directory | |
| # Sets the initial partitioner token for a node the first time the node is started. | |
| #-Dcassandra.initial_token=token | |
| # Set to false to start Cassandra on a node but not have the node join the cluster. | |
| #-Dcassandra.join_ring=true|false | |
| # Set to false to clear all gossip state for the node on restart. Use when you have changed node | |
| # information in cassandra.yaml (such as listen_address). | |
| #-Dcassandra.load_ring_state=true|false | |
| # Enable pluggable metrics reporter. See Pluggable metrics reporting in Cassandra 2.0.2. | |
| #-Dcassandra.metricsReporterConfigFile=file | |
| # Set the port on which the CQL native transport listens for clients. (Default: 9042) | |
| #-Dcassandra.native_transport_port=port | |
| # Overrides the partitioner. (Default: org.apache.cassandra.dht.Murmur3Partitioner) | |
| #-Dcassandra.partitioner=partitioner | |
| # To replace a node that has died, restart a new node in its place specifying the address of the | |
| # dead node. The new node must not have any data in its data directory, that is, it must be in the | |
| # same state as before bootstrapping. | |
| #-Dcassandra.replace_address=listen_address or broadcast_address of dead node | |
| # Allow restoring specific tables from an archived commit log. | |
| #-Dcassandra.replayList=table | |
| # Allows overriding of the default RING_DELAY (1000ms), which is the amount of time a node waits | |
| # before joining the ring. | |
| #-Dcassandra.ring_delay_ms=ms | |
| # Set the port for the Thrift RPC service, which is used for client connections. (Default: 9160) | |
| #-Dcassandra.rpc_port=port | |
| # Set the SSL port for encrypted communication. (Default: 7001) | |
| #-Dcassandra.ssl_storage_port=port | |
| # Enable or disable the native transport server. See start_native_transport in cassandra.yaml. | |
| # cassandra.start_native_transport=true|false | |
| # Enable or disable the Thrift RPC server. (Default: true) | |
| #-Dcassandra.start_rpc=true/false | |
| # Set the port for inter-node communication. (Default: 7000) | |
| #-Dcassandra.storage_port=port | |
| # Set the default location for the trigger JARs. (Default: conf/triggers) | |
| #-Dcassandra.triggers_dir=directory | |
| # For testing new compaction and compression strategies. It allows you to experiment with different | |
| # strategies and benchmark write performance differences without affecting the production workload. | |
| #-Dcassandra.write_survey=true | |
| ######################## | |
| # GENERAL JVM SETTINGS # | |
| ######################## | |
| # enable assertions. disabling this in production will give a modest | |
| # performance benefit (around 5%). | |
| -ea | |
| # enable thread priorities, primarily so we can give periodic tasks | |
| # a lower priority to avoid interfering with client workload | |
| -XX:+UseThreadPriorities | |
| # allows lowering thread priority without being root on linux - probably | |
| # not necessary on Windows but doesn't harm anything. | |
| # see http://tech.stolsvik.com/2010/01/linux-java-thread-priorities-workar | |
| -XX:ThreadPriorityPolicy=42 | |
| # Enable heap-dump if there's an OOM | |
| -XX:+HeapDumpOnOutOfMemoryError | |
| # Per-thread stack size. | |
| -Xss256k | |
| # Larger interned string table, for gossip's benefit (CASSANDRA-6410) | |
| -XX:StringTableSize=1000003 | |
| # Make sure all memory is faulted and zeroed on startup. | |
| # This helps prevent soft faults in containers and makes | |
| # transparent hugepage allocation more effective. | |
| -XX:+AlwaysPreTouch | |
| # Disable biased locking as it does not benefit Cassandra. | |
| -XX:-UseBiasedLocking | |
| # Enable thread-local allocation blocks and allow the JVM to automatically | |
| # resize them at runtime. | |
| -XX:+UseTLAB | |
| -XX:+ResizeTLAB | |
| # http://www.evanjones.ca/jvm-mmap-pause.html | |
| -XX:+PerfDisableSharedMem | |
| # Prefer binding to IPv4 network intefaces (when net.ipv6.bindv6only=1). See | |
| # http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6342561 (short version: | |
| # comment out this entry to enable IPv6 support). | |
| -Djava.net.preferIPv4Stack=true | |
| ### Debug options | |
| # uncomment to enable flight recorder | |
| #-XX:+UnlockCommercialFeatures | |
| #-XX:+FlightRecorder | |
| # uncomment to have Cassandra JVM listen for remote debuggers/profilers on port 1414 | |
| #-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=1414 | |
| # uncomment to have Cassandra JVM log internal method compilation (developers only) | |
| #-XX:+UnlockDiagnosticVMOptions | |
| #-XX:+LogCompilation | |
| ################# | |
| # HEAP SETTINGS # | |
| ################# | |
| # Heap size is automatically calculated by cassandra-env based on this | |
| # formula: max(min(1/2 ram, 1024MB), min(1/4 ram, 8GB)) | |
| # That is: | |
| # - calculate 1/2 ram and cap to 1024MB | |
| # - calculate 1/4 ram and cap to 8192MB | |
| # - pick the max | |
| # | |
| # For production use you may wish to adjust this for your environment. | |
| # If that's the case, uncomment the -Xmx and Xms options below to override the | |
| # automatic calculation of JVM heap memory. | |
| # | |
| # It is recommended to set min (-Xms) and max (-Xmx) heap sizes to | |
| # the same value to avoid stop-the-world GC pauses during resize, and | |
| # so that we can lock the heap in memory on startup to prevent any | |
| # of it from being swapped out. | |
| #-Xms4G | |
| #-Xmx4G | |
| # Young generation size is automatically calculated by cassandra-env | |
| # based on this formula: min(100 * num_cores, 1/4 * heap size) | |
| # | |
| # The main trade-off for the young generation is that the larger it | |
| # is, the longer GC pause times will be. The shorter it is, the more | |
| # expensive GC will be (usually). | |
| # | |
| # It is not recommended to set the young generation size if using the | |
| # G1 GC, since that will override the target pause-time goal. | |
| # More info: http://www.oracle.com/technetwork/articles/java/g1gc-1984535.html | |
| # | |
| # The example below assumes a modern 8-core+ machine for decent | |
| # times. If in doubt, and if you do not particularly want to tweak, go | |
| # 100 MB per physical CPU core. | |
| #-Xmn800M | |
| ################# | |
| # GC SETTINGS # | |
| ################# | |
| ### CMS Settings | |
| -XX:+UseParNewGC | |
| -XX:+UseConcMarkSweepGC | |
| -XX:+CMSParallelRemarkEnabled | |
| -XX:SurvivorRatio=8 | |
| -XX:MaxTenuringThreshold=1 | |
| -XX:CMSInitiatingOccupancyFraction=75 | |
| -XX:+UseCMSInitiatingOccupancyOnly | |
| -XX:CMSWaitDuration=10000 | |
| -XX:+CMSParallelInitialMarkEnabled | |
| -XX:+CMSEdenChunksRecordAlways | |
| # some JVMs will fill up their heap when accessed via JMX, see CASSANDRA-6541 | |
| -XX:+CMSClassUnloadingEnabled | |
| ### G1 Settings (experimental, comment previous section and uncomment section below to enable) | |
| ## Use the Hotspot garbage-first collector. | |
| #-XX:+UseG1GC | |
| # | |
| ## Have the JVM do less remembered set work during STW, instead | |
| ## preferring concurrent GC. Reduces p99.9 latency. | |
| #-XX:G1RSetUpdatingPauseTimePercent=5 | |
| # | |
| ## Main G1GC tunable: lowering the pause target will lower throughput and vise versa. | |
| ## 200ms is the JVM default and lowest viable setting | |
| ## 1000ms increases throughput. Keep it smaller than the timeouts in cassandra.yaml. | |
| #-XX:MaxGCPauseMillis=500 | |
| ## Optional G1 Settings | |
| # Save CPU time on large (>= 16GB) heaps by delaying region scanning | |
| # until the heap is 70% full. The default in Hotspot 8u40 is 40%. | |
| #-XX:InitiatingHeapOccupancyPercent=70 | |
| # For systems with > 8 cores, the default ParallelGCThreads is 5/8 the number of logical cores. | |
| # Otherwise equal to the number of cores when 8 or less. | |
| # Machines with > 10 cores should try setting these to <= full cores. | |
| #-XX:ParallelGCThreads=16 | |
| # By default, ConcGCThreads is 1/4 of ParallelGCThreads. | |
| # Setting both to the same value can reduce STW durations. | |
| #-XX:ConcGCThreads=16 | |
| ### GC logging options -- uncomment to enable | |
| -XX:+PrintGCDetails | |
| -XX:+PrintGCDateStamps | |
| -XX:+PrintHeapAtGC | |
| -XX:+PrintTenuringDistribution | |
| -XX:+PrintGCApplicationStoppedTime | |
| -XX:+PrintPromotionFailure | |
| #-XX:PrintFLSStatistics=1 | |
| #-Xloggc:/var/log/cassandra/gc.log | |
| -XX:+UseGCLogFileRotation | |
| -XX:NumberOfGCLogFiles=10 | |
| -XX:GCLogFileSize=10M |
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