benchmark.md

Benchmark

Disk

Write Speed:

sync; dd if=/dev/zero of=tempfile bs=1M count=1024; sync

Read Speed:

• Reads the file written during the write test.
• The file may be read from the cache. Therefore execute /sbin/sysctl -w vm.drop_caches=3 first before testing.

dd if=tempfile of=/dev/null bs=1M count=1024

IOPS Write:

• Test write IOPS by performing sequential writes, using an I/O block size of 4 KB and an I/O depth of at least 64
• Set $TEST_DIR to a empty directory on the target disk

fio --name=write_iops --directory=$TEST_DIR --size=10G \
--time_based --runtime=60s --ramp_time=2s --ioengine=libaio --direct=1 \
--verify=0 --bs=4K --iodepth=64 --rw=randwrite --group_reporting=1

IOPS Read:

• Test read IOPS, using an I/O block size of 4 KB and an I/O depth of at least 64
• Set $TEST_DIR to a empty directory on the target disk

fio --name=read_iops --directory=$TEST_DIR --size=10G \
--time_based --runtime=60s --ramp_time=2s --ioengine=libaio --direct=1 \
--verify=0 --bs=4K --iodepth=64 --rw=randread --group_reporting=1

MySQL

Requirements:

• MySQL Database with name sbtest

# prepare
sysbench /usr/share/sysbench/oltp_read_write.lua --db-driver=mysql --mysql-user=root  --tables=1 --table-size=25000000 --report-interval=10 --threads=128 prepare

# run
sysbench /usr/share/sysbench/oltp_read_write.lua  --db-driver=mysql --mysql-user=root  --tables=1 --table-size=25000000 --report-interval=10 --threads=128 run

Source

• Benchmarking persistent disk performance