Disk IO read-write performance test script under Linux

#!/bin/sh#author:reed#blog:luweikai.blog.51cto.com# Description: Use the OWN DD command file=dd.filebs_count_8k= (8K 12K) BS_COUNT_ 64k= (64k 6k) bs_count_1m= (1m 1k) list= "8k 64k 1m" wlog=/tmp/ddwrite.logrlog=/tmp/ddread.log# Writewrite () {        echo  "[Info]write"          for i in  $list;d o                 bs=$ (eval echo \$\{bs_count_$i\[0\]\})                  count=$ (eval echo \$\{ Bs_count_$i\[1\]\})                  echo  "dd if=/dev/zero of= $file  conv=fsync oflag=direct bs= $bs  count=$ Count "                dd  if=/dev/zero  of= $file  conv=fsync oflag=direct bs= $bs  count= $count  2>> $wlog                  echo  " "                   #echo   Sleep  3 "                sleep  3        done} #readRead () {         echo  "[Info]read"         for i in $ list;do                bs=$ ( Eval echo \$\{bs_count_$i\[0\]\})                  count=$ (eval echo \$\{bs_count_$i\[1\]\})                  echo  "dd if= $file  of=/dev/null iflag=direct bs= $bs  count= $count "                 dd if= $file  of=/dev/null iflag=direct bs= $bs  count= $count  2>>   $rlog                  echo  " "                   #echo   "Sleep 3"                  sleep 3        done}write|tee -a $ wlogecho  "Please wait 5 seconds ..." sleep 5read|tee -a  $rlog

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Disk IO read-write performance test script under Linux