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1) Install the fio from the source(可以從這邊下載Source)
#tar zxvf fio-<version>.tar.gz
#cd fio-<version>
#./configure && make && make install

2) Introduction the parameter about the fio
--rw:設定I/O Pattern的類型,有read、write、randread、randwrite、rw與randrw(Rand為隨機,其餘為順序)
--ioengine:定義如何執行I/O,有sync、psync、vsync、libaio(Linux native[Default]、posixaio、mmap、splice、syslet-rw、sg、null、net、netsplice、cpuio、guasi與external
--bs:Block Size,寫入檔案的大小,Default為4K
--rwmixread:設定Mixed中Read Loading的百分比,Default為50(限定有RW)

3) Example for the increasing numjobs(以Thread為1,2,4,8…512為例)
#! /bin/bash
while [[ $CNT -lt 10 ]]
fio --filename=/dev/sdb --direct=1 --rw=randread --ioengine=libaio --bs=16k --iodepth=16 --numjobs=$((2**$CNT)) --runtime=30 --group_reporting --name=conf_$(($CNT+1)) --output=fio_$(($CNT+1)).log
#chmod a+x
#cat fio_*.log

4) Review and explain the result from the fio(The last line 2)
Run status group 0 (all jobs):
READ: io=xxxxx.xMB, aggrb=xxxxxxKB/s, minb=xxxxxxKB/s, maxb=xxxxxxKB/s, mint=xxxxxmsec, maxt=xxxxxmsec
Disk stats (read/write):
sdb: ios=xxxxx/0, merge=0/0, ticks=xxxxx/0, in_queue=xxxxx, util=xx.xx%
io:Number of megabytes I/O performed. -> ios*bs
aggrb:Aggregate bandwidth of threads in the group.
minb:Minimum average bandwidth a thread saw.
maxb:Maximum average bandwidth a thread saw.
mint:Shortest runtime of threads in the group.
maxt:Longest runtime of threads in the group.
ios:Number of I/Os performed by all groups. -> IOPS=ios/runtime(s)
merge:Number of merges in the I/O scheduler.
ticks:Number of ticks we kept the disk busy.
io_queue:Total time spent in the disk queue.
util:Disk utilization.

◎、以上就是FIO這支Tool的簡易使用介紹,若要用於SSD前請先做資料的破碎化,此外,上述Parameter的部分均可自行寫成一個Configuration File後,直接#fio .cfg來做執行即可。上述內容均參考Benjr大大文章,至於看倌們想要知道更多,可以直接到這裡參詳參詳一下吧,先到這,收工囉!

  1. 嗨 請問要怎麼做SSD的破碎化? 有參考文章嗎? 謝謝

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