Re: [CentOS] Linux tool to check random I/O performance

Am 04.09.2013 21:44, schrieb mcclnx mcc:

we just purchase new I/O card and like to check I/O performance.

for sequence I/O performance test we can use "hdparm -t /dev/xxx"

I think hdparm is really sub-optimal. "hdparm -t" will not give you any reliable value. "dd" instead lets you control parameters like size of data transmitted, and has control feature through oflag and iflag, and lets you test read and write spead independently.

bur for random I/O performance test which Linux command I can use?

fio http://freecode.com/projects/fio

Available through EPEL.

** our environment does NOT allow install third party software..

Don't know whether EPEL is already forbidden land for you.

Thanks

Alexander