shell脚本，while for 循环

1、循环100次fio指令，写磁盘压力测试，测试快速写文件的速度

while true

do

for i in {1...1170};do

echo "===================> i < = = = = = = = = = = = = = = = = = = " f i o − − n a m e = r w t e s t i <==================" fio --name=rw_test i<=================="fio−−name=rwtesti --iodepth=32 --rw=write -bs=512Ki --direct=1 --size=100Mi --numjobs=1 --runtime=240 --group_reporting --ioengine=libaio

sleep 0.8

if ( ( (( ((i % 100)) == 0 ;then

df -h

fi

done

done

2、或第二种写法

#!bin/bash

cnt=1

while $cnt -lt 50

do

echo "dd cnt $cnt" > /dev/console

     dd if=/dev/zero of=/mnt/data/test_${cnt}.txt bs=1024 count=102400
     
     let cnt++

     sleep 1

done