CentOS - Sep 2013 - Linux tool to check random I/O performance

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"

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

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

Thanks

mcclnx mcc wrote:
> 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"
>
> bur for random I/O performance test which Linux command I can use?
>
> ** our environment does NOT allow install third party software..
>
What do you mean by "third party software"? There *is* a package in
the
epel repository named stress that will, I think, do what you want.

      mark

On 9/4/2013 13:44, mcclnx mcc wrote:
>
> for sequence I/O performance test we can use "hdparm -t /dev/xxx"
>
> bur for random I/O performance test which Linux command I can use?
I use Bonnie++ for that:

     http://www.coker.com.au/bonnie++/

Actually, I've been using the experimental pre-2.x version:

     http://www.coker.com.au/bonnie++/experimental/

It's a far better test for sequential I/O than hdparm -Tt, too.
> ** our environment does NOT allow install third party software..
Not even if it's:

  a) only for a test
  b) never installed, and
  c) removed immediately after the test completes?

Bonnie++ is self-contained, easy to build, and will run from the build 
directory without having to be "make install"ed.  You can just remove 
the build directory when the test is done.  There will be no traces that 
the program was ever present.  We won't tell anyone you violated policy. :)

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

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"

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

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

Thanks