iops和throughputiops是randrwthroughput是seqrw实际场景是读写混合，所以用读写混合的fio命令测试sata盘的iops输出分析avg-cpu:%user%nice%system%iowait%steal%idle7.010.001.060.000.0091.92r/s和w/s是读写的iopsDevice:rrqm/swrqm/sr/sw/srMB/swMB/savgrq-szavgqu-szawaitr_awaitw_awaitsvctm%utilsda0.0023.000.008.500.000.1537.180.000.000.000.000.000.00sdb0.000.00462.50451.501.811.768.00127.99138.95180.6796.221.09100.00sdc0.000.000.000.000.000.000.000.000.000.000.000.000.00SDD0.000.000.000.000.000.000.000.000.000.00SDE0.000.000.000.000.000.000.000.00.000.000.00单盘性能sas,sata,fc类型单盘性能对比http://wintelguy.com/2013/201...raid性能5盘raid5iopsroot@SEG-01:/data/osd.0#fio--name=seqwrite--filename=fio.txt-rw=randrw--rwmixread=50--bs=4K--size=20G--runtime=120--ioengine=libaio--iodepth=128--numjobs=1--direct=1--group_reportingseqwrite:(g=0):rw=randrw,bs=4K-4K/4K-4K,ioengine=libaio,iodepth=128Starting1processJobs:1(f=1):[m][2.1%done][1462K/1495K/s][357/365iops][eta01h:32m:16s]seqwrite:(groupid=0,jobs=1):err=0:pid=334070read:io=224444KB,bw=1856KB/s,iops=464,runt=120904msecslat(usec):min=3,max=23101,avg=13.58,stdev=123.96clat(usec):min=46,max=3042K,avg=181455.83,stdev=209512.95bw(KB/s):min=0,max=5101,per=77.87%,avg=1445.34,stdev=1082.05write:io=224556KB,bw=1857KB/s,iops=464,runt=120904msecslat(usec):min=4,max=2413K,avg=230.95,stdev=18741.08clat(usec):min=31,max=2938K,avg=93941.29,stdev=136416.60bw(KB/s):min=0,max=5824,per=90.06%,avg=1672.33,stdev=1017.45cpu:usr=0.48%,sys=2.12%,ctx=101477,majf=0,minf=2092IO深度：1=0.1%,2=0.1%,4=0.1%,8=0.1%,16=0.1%,32=0.1%,>=64=99.9%提交：0=0.0%,4=100.0%,8=0.0%,16=0.0%,32=0.0%,64=0.0%,>=64=0.0%完成：0=0.0%,4=100.0%,8=0.0%,16=0.0%,32=0.0%,64=0.0%,>=64=0.1%发行r/w:total=56111/56139,short=0/0lat(usec):50=5.58%,100=2.20%,250=0.06%,500=0.11%,750=0.21%lat(usec):1000=0.12%lat(msec):2=0.11%,4=0.28%,10=0.39%,20=0.74%,50=3.93%lat(msec):100=27.78%、250=49.86%、500=6.63%、750=1.00%、1000=0.37%纬度（毫秒）：2000=0.30%、>=2000=0.34%运行状态组0（所有作业）：READ：io=224444KB，aggrb=1856KB/s，minb=1900KB/s，maxb=1900KB/s，mint=120904msec，maxt=120904msec写入：io=224556KB，aggrb=1857KB/s，minb=1901KB/s，maxb=1901KB/s,m??int=120904msec,maxt=120904msecDiskstats(read/write):sdb:ios=56213/56364，merge=0/144，ticks=9412060/4768560，in_queue=14183068，util=99.97%9盘raid5
