系统性能测试

cpu_performace_test.sh

time echo "scale=5000; a(1)*4" | bc -l > /dev/null

disk_performace_test.sh

time dd bs=1M count=5000 if=/dev/zero of=/tmp/dd.test
time dd bs=1M count=5000 if=/tmp/dd.test of=/dev/null
rm -f /tmp/dd.test

mem_performace_test.sh

# ramspeed   http://alasir.com/software/ramspeed/
# 还有个SMP版的，可以学习源代码
wget www.alasir.com/software/ramspeed/ramspeed-2.6.0.tar.gz

tar zxf ramspeed-2.6.0.tar.gz

cd ramspeed-2.6.0

gcc -Wall -O2 -Wl,-O2 -Wl,-s ramspeed.c  intmem.c intmark.c fltmark.c fltmem.c -o ramspeed

./ramspeed

network_performace_test.sh

# Server
nc -v -l 2222 > /dev/null

# Client
time dd if=/dev/zero bs=1M count=1000 | nc SERVER_HOST_NAME 2222 -v

tune_fs

tune2fs

blockdev

mount

umount

the scale is the total number of decimal digits after the decimal point. 保留小数点后几位
a (x) The arctangent of x, arctangent returns radians.