Joshua Shinavier joshsh
joshsh
/ gist:201dc5951d20ef83d80419aebaad7551
Last active
June 2, 2017 23:02
JanusGraph (example SmSn page)
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| * a highly scalable open-source graph database | |
| -- history | |
| * JanusGraph was forked from Titan in December, 2016 | |
| -- related tools | |
| * Titan (graph database) | |
| * JanusGraph is a community project which is a continuation of Titan, now maintained but not developed by DataStax | |
| -- similarities and differences | |
| * Cassandra 3.x support | |
| * as of June, 2017, the Uber fork of JanusGraph contains limited support for Cassandra 3 | |
| * CQL support |
joshsh
/ tp2-to-tp3-smsn-graphml.xslt
Created
November 17, 2016 01:15
XSLT to convert from the TinkerPop2 GraphML input/output format to a SmSn-compatible Apache TinkerPop format
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| <xsl:stylesheet version="1.0" | |
| xmlns="http://graphml.graphdrawing.org/xmlns" | |
| xmlns:graphml="http://graphml.graphdrawing.org/xmlns" | |
| xmlns:xsl="http://www.w3.org/1999/XSL/Transform" | |
| exclude-result-prefixes="graphml"> | |
| <xsl:output method="xml" indent="yes" omit-xml-declaration="yes"/> | |
| <xsl:strip-space elements="*"/> | |
| <xsl:template match="node()|@*"> | |
| <xsl:copy> |
joshsh
/ tp2-to-tp3-graphml.xslt
Last active
November 18, 2016 19:28
XSLT to convert from the TinkerPop2 GraphML input/output format to the Apache TinkerPop format
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| <xsl:stylesheet version="1.0" | |
| xmlns="http://graphml.graphdrawing.org/xmlns" | |
| xmlns:graphml="http://graphml.graphdrawing.org/xmlns" | |
| xmlns:xsl="http://www.w3.org/1999/XSL/Transform" | |
| exclude-result-prefixes="graphml"> | |
| <xsl:output method="xml" indent="yes" omit-xml-declaration="yes"/> | |
| <xsl:strip-space elements="*"/> | |
| <xsl:template match="node()|@*"> | |
| <xsl:copy> |
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| final QueryEngine qe = new QueryEngineImpl(); | |
| qe.addQuery("", new BindingSetHandler() { | |
| public void handle(final BindingSet result) { | |
| // Do something with your result | |
| } | |
| }); | |
| RDFParser p = Rio.createParser(RDFFormat.TURTLE); | |
| p.setRDFHandler(new RDFHandler() { |
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| final QueryEngine qe = new QueryEngineImpl(); | |
| qe.addQuery("", new BindingSetHandler() { | |
| public void handle(final BindingSet result) { | |
| // Do something with your result | |
| } | |
| }); | |
| RDFParser p = Rio.createParser(RDFFormat.TURTLE); | |
| p.setRDFHandler(new RDFHandler() { |
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| package com.tinkerpop.gremlin.process.graph.step.filter; | |
| import com.tinkerpop.gremlin.process.PathTraverser; | |
| import com.tinkerpop.gremlin.process.Traversal; | |
| import com.tinkerpop.gremlin.process.Traverser; | |
| import com.tinkerpop.gremlin.process.util.AbstractStep; | |
| import com.tinkerpop.gremlin.process.util.FastNoSuchElementException; | |
| import com.tinkerpop.gremlin.process.util.TraversalHelper; | |
| import com.tinkerpop.gremlin.util.function.SPredicate; |
joshsh
/ gist:299dc3f4dc17f0617687
Created
August 11, 2014 13:39
stack overflow in JavaComputerMapTest
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| Tests run: 128, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 2.959 sec <<< FAILURE! - in com.tinkerpop.gremlin.tinkergraph.process.TinkerGraphProcessComputerTest | |
| g_V_matchXa_hasXname_GarciaX__a_0written_by_b__a_0sung_by_bX(com.tinkerpop.gremlin.process.graph.step.map.MatchTest$JavaComputerMapTest) Time elapsed: 0.246 sec <<< ERROR! | |
| java.lang.StackOverflowError: null | |
| at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988) | |
| at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496) | |
| at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432) | |
| at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178) | |
| at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348) | |
| at java.util.HashMap.internalWriteEntries(HashMap.java:1777) | |
| at java.util.HashMap.writeObject(HashMap.java:1354) |
joshsh
/ gist:11381828
Created
April 28, 2014 19:34
titan-hbase-094/logs/hbase-josh-master-marvin6.local.log
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| Sun Apr 27 06:16:12 EDT 2014 Starting master on marvin6.local | |
| core file size (blocks, -c) 0 | |
| data seg size (kbytes, -d) unlimited | |
| file size (blocks, -f) unlimited | |
| max locked memory (kbytes, -l) unlimited | |
| max memory size (kbytes, -m) unlimited | |
| open files (-n) 10240 | |
| pipe size (512 bytes, -p) 1 | |
| stack size (kbytes, -s) 8192 | |
| cpu time (seconds, -t) unlimited |
joshsh
/ gist:11341645
Created
April 27, 2014 09:42
titan05 unit test failures (titan-berkeleyje and titan-cassandra)
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| ------------------------------------------------------------------------------- | |
| Test set: com.thinkaurelius.titan.graphdb.berkeleyje.BerkeleyJEGraphTest | |
| ------------------------------------------------------------------------------- | |
| Tests run: 29, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 71.581 sec <<< FAILURE! - in com.thinkaurelius.titan.graphdb.berkeleyje.BerkeleyJEGraphTest | |
| testTypes(com.thinkaurelius.titan.graphdb.berkeleyje.BerkeleyJEGraphTest) Time elapsed: 0.15 sec <<< ERROR! | |
| java.lang.IllegalArgumentException: Only one open instance but its not the current one: [c0a801746369@marvin6] | |
| at com.google.common.base.Preconditions.checkArgument(Preconditions.java:120) | |
| at com.thinkaurelius.titan.graphdb.database.management.ManagementSystem$1.verifyModification(ManagementSystem.java:98) | |
| at com.thinkaurelius.titan.diskstorage.configuration.UserModifiableConfiguration.set(UserModifiableConfiguration.java:84) | |
| at com.thinkaurelius.titan.graphdb.database.management.ManagementSystem.set(ManagementSyst |
joshsh
/ gist:10953965
Created
April 17, 2014 04:59
OOME in titan-cassandra unit test (titan05 branch)
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| Running com.thinkaurelius.titan.diskstorage.cassandra.thrift.InternalCassandraThriftMultiWriteKeyColumnValueStoreTest | |
| Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 36.272 sec - in com.thinkaurelius.titan.diskstorage.cassandra.thrift.InternalCassandraThriftMultiWriteKeyColumnValueStoreTest | |
| 76484 [MutationStage:30] WARN org.apache.cassandra.db.commitlog.CommitLog - Skipping commitlog append of extremely large mutation (37749187 bytes) | |
| 77500 [MutationStage:14] WARN org.apache.cassandra.db.commitlog.CommitLog - Skipping commitlog append of extremely large mutation (46137871 bytes) | |
| java.lang.OutOfMemoryError: Java heap space | |
| Dumping heap to java_pid3461.hprof ... | |
| Heap dump file created [1079694436 bytes in 5.678 secs] | |
| 89178 [FlushWriter:1] ERROR org.apache.cassandra.service.CassandraDaemon - Exception in thread Thread[FlushWriter:1,5,main] | |
| java.lang.OutOfMemoryError: Java heap space | |
| at org.apache.cassandra.io.util.FastByteArrayOutputStream.expand(FastByteArrayOutputStream.java:104) |