Centos Check disk read and write performance

Start Tomcat finds the deploy war significantly slower, suspected disk problems

Test Write

[Email protected] ~]$DD if=/dev/zero of=kwxgd bs=64k count=4k oflag=Dsync4096+0Recordsinch4096+0Records out268435456Bytes (268MB) Copied,127.514S2.1MB/S[[email protected]~]$ Iostatlinux2.6. +-131.0. the. el6.x86_64 (Localhost.localdomain) -/ Geneva/ -_x86_64_ ( -CPU) Avg-CPU:%user% Nice%system%iowait%steal%Idle0.16    0.00    0.08    0.08    0.00   99.67Device:tps Blk_read/s blk_wrtn/s Blk_read blk_wrtnsda10.08         0.04       120.22    1583980 4321086552

Test Read

DD if=kwxgd of=/dev/zero bs=64k count=4k iflag=direct

HDD Performance test
First, install the Hdparm

Yum Install hdparm-y

Second, the evaluation of reading
SSD Drive, use the hdparm command to read the test.

Hdparm-t/dev/xvda

SSH executes the above command, you can use Hdparm to evaluate the SSD read rate.
"/dev/xvda" refers to the drive letter of the corresponding disk, please perform "fdisk-l" view

Centos Check disk read and write performance