sysbench fileio 压力测试

时间：2023-03-09 16:27:53
sysbench fileio 压力测试
备注：
  使用的是yum 安装
1. 安装
yum install -y sysbench
2. 命令
fileio options:

  --file-num=N              number of files to create [128]

  --file-block-size=N       block size to use in all IO operations [16384]

  --file-total-size=SIZE    total size of files to create [2G]

  --file-test-mode=STRING   test mode {seqwr, seqrewr, seqrd, rndrd, rndwr, rndrw}

  --file-io-mode=STRING     file operations mode {sync,async,mmap} [sync]

  --file-async-backlog=N    number of asynchronous operatons to queue per thread [128]

  --file-extra-flags=STRING additional flags to use on opening files {sync,dsync,direct} []

  --file-fsync-freq=N       do fsync() after this number of requests (0 - don't use fsync()) [100]

  --file-fsync-all[=on|off] do fsync() after each write operation [off]

  --file-fsync-end[=on|off] do fsync() at the end of test [on]

  --file-fsync-mode=STRING  which method to use for synchronization {fsync, fdatasync} [fsync]

  --file-merged-requests=N  merge at most this number of IO requests if possible (0 - don't merge) [0]

  --file-rw-ratio=N         reads/writes ratio for combined test [1.5]
3. 使用
// 数据准备

sysbench fileio  --file-num=1000  --file-test-mode=seqwr prepare

// 运行

sysbench fileio  --file-num=1000  --file-test-mode=seqwr run

// 清理

sysbench fileio  --file-num=1000  --file-test-mode=seqwr cleanup
4. 问题
a.FATAL: Too large position discovered in request!

--file-num  --file-block-size   --file-total-size 参数必须能够整除

b. ulimit 限制

   临时调整 ulimit 65535，同时也可以参考类似的文章进行修改

c. 对于指定的 --file-test-mode prepare run 必须一致
5. 参考资料
https://github.com/akopytov/sysbench

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