From: Jens Axboe <axboe@kernel.dk>
To: "Strickland, Carl" <carl.strickland@intel.com>
Cc: "fio@vger.kernel.org" <fio@vger.kernel.org>
Subject: Re: FIO r/w to 2 disks
Date: Thu, 14 Jun 2012 09:54:54 +0200 [thread overview]
Message-ID: <4FD998CE.3030705@kernel.dk> (raw)
In-Reply-To: <4E57E183169EA04186759995F13BDC621A18A7C7@FMSMSX103.amr.corp.intel.com>
On 2012-06-08 21:52, Strickland, Carl wrote:
> Hi All,
>
> I'm performing a series of time-based storage tests and need FIO to read and
> write to separate disks, in the ratio specified (e.g. 80/20).
>
> I've performed initial tests with two FIO instances (one read, one write), but
> found that in one scenario I get a ratio of ~50/50 and in another I get
> ~60/40. However, in order to compare the results of these tests, their ratios
> must be approximately equal.
>
> Is it possible to achieve this with a single FIO instance? Do you have any
> recommendations for achieving a specific ratio with two FIO instances?
It's not clear from your email exactly what kind of job(s) you ran. Have
you tried a single job with rwmix set? rwmixread=80 and rw=randrw should
give you the requested ratio, 80% reads and 20% writes.
--
Jens Axboe
next prev parent reply other threads:[~2012-06-14 7:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-08 19:52 FIO r/w to 2 disks Strickland, Carl
2012-06-14 7:54 ` Jens Axboe [this message]
2012-06-14 23:41 ` Strickland, Carl
2012-06-15 6:49 ` Jens Axboe
2012-06-18 15:48 ` Strickland, Carl
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