Getting one of your power users to run a  high load   'real world' job is something we do (in addition to the normal sets of benchmark tools).  It can expose more than just filesystem related weaknesses.  Kill Infiniband gateways or  FDR to QDR rate drops  is some of the things we have seen during lustre  testing.   Using real jobs, from real users  has shown us alot more than what  iozone and dd did.




On Tue, Jan 21, 2014 at 11:16 AM, White, Cliff <cliff.white@intel.com> wrote:
From: "E.S. Rosenberg" <esr+hpdd-discuss@mail.hebrew.edu<mailto:esr+hpdd-discuss@mail.hebrew.edu>>
Date: Tuesday, January 21, 2014 at 6:30 AM
To: "hpdd-discuss@lists.01.org<mailto:hpdd-discuss@lists.01.org>" <hpdd-discuss@lists.01.org<mailto:hpdd-discuss@lists.01.org>>
Subject: [HPDD-discuss] Good stress testing for lustre

Hi all,
Is there any good stress testing software for lustre?
Right now I am just using dd on the clients and seeing how much throughput I am getting but I was hoping there is maybe something a bit better...

Thanks,
Eli

Iozone  has a multi-client option which makes a good stress test.  To really exercise the filesystem, you need a tool which can spawn load on multiple clients.
IOR is quite good for this.  If you are after stress rather than performance, simply spawning as much random work as you possibly can is also good.
cliffw

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