On Sun, Feb 23, 2014 at 8:12 PM, Hall, Shawn <Shawn.Hall(a)bp.com> wrote:
I don't have somewhere to try it at the moment, but my guess
that you're putting your options after the filename - what if you do:
lfs setstripe -c 10 iozone.tmp
Same result, I should have said I tried that , sorry :/
*From:* HPDD-discuss [hpdd-discuss-bounces(a)lists.01.org] on behalf of
E.S. Rosenberg [esr+hpdd-discuss(a)mail.hebrew.edu]
*Sent:* Sunday, February 23, 2014 11:27 AM
*To:* Alexander I Kulyavtsev
*Subject:* Re: [HPDD-discuss] iozone and lustre
On Thu, Feb 20, 2014 at 7:46 PM, Alexander I Kulyavtsev <aik(a)fnal.gov>wrote:
> You may want to use iozone in throughput mode, with flag -t. It will use
> multple writers/readers on the same node.
> If you wish to use several client nodes, use iozone cluster mode -+m .
> You need to prepare cluster file to describe file locations.
> Use file size , data set large enough to "flush" data after write on
> server, otherwise read rates are "too good" as data read from memory. Try
> iozone remount option. We used iozone wrapper on slave nodes and set "dont
> need" flag for the file on write so it is flushed from cache, at least
> rates changed.
> You may want to watch rates on network and choose time period when all
> processes do io. Iozone printout includes period when some procs finished
> and late starters doing io.
> But: network rates include retries and read aheads.
> This is independent of file striping.
Thanks Alex I'm going to try that!
Sorry that I keep bothering everyone but:
How do I troubleshoot lfs setstripe that refuses saying it's getting an
invalid argument (22)?
lfs setstripe iozone.tmp -c 10
unable to open 'iozone.tmp': Invalid argument (22)
error: setstripe: create stripe file 'iozone.tmp' failed
I have tried first touching the file, I have tried it on directories
(both existing and non-existing) but all the same result.
I am running the command as a regular user inside a folder that belongs
to the user....
> On Feb 20, 2014, at 8:01 AM, "E.S. Rosenberg" <
> esr+hpdd-discuss(a)mail.hebrew.edu> wrote:
> > at the moment I am just using automated tests...
> > (iozone -Ra -g 64G)