From: Jens Axboe <jens.axboe@oracle.com>
To: "Alan D. Brunelle" <Alan.Brunelle@hp.com>
Cc: fio@vger.kernel.org
Subject: Re: Large numbers of devices...
Date: Wed, 19 Aug 2009 14:51:47 +0200 [thread overview]
Message-ID: <20090819125147.GB12579@kernel.dk> (raw)
In-Reply-To: <1250686030.5589.1.camel@cail>
On Wed, Aug 19 2009, Alan D. Brunelle wrote:
> On Wed, 2009-08-19 at 11:03 +0200, Jens Axboe wrote:
>
> >
> > Alan, I haven't run with that many files, so it's indeed possible that
> > there's an inherent limitiation in the file selection in fio. It's not
> > my best code, that part... If you have the time and inclination to jump
> > in there and find out what is going on, then that would be great!
> >
>
> OK, will do - I just wanted to check that the fio job-file looked OK.
It looks fine, in fact if that is your setup, then you are not using the
multi file stuff. Your job files basically creates a process per device,
which should work fine as-is.
You can try and play with the iodepth batching control, iodepth_batch
and iodepth_batch_complete. They both default to 1, meaning that it'll
submit and complete 1 command at the time.
--
Jens Axboe
next prev parent reply other threads:[~2009-08-19 12:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-17 17:33 Large numbers of devices Alan D. Brunelle
2009-08-19 9:03 ` Jens Axboe
2009-08-19 12:47 ` Alan D. Brunelle
2009-08-19 12:51 ` Jens Axboe [this message]
2009-08-19 22:44 ` Alan D. Brunelle
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