linux-kernel - Re: io-scheduler tuning for better read/write ratio

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Message-ID: <4A37E7DB.7030100@redhat.com>
Date:	Tue, 16 Jun 2009 14:43:39 -0400
From:	Casey Dahlin <cdahlin@...hat.com>
To:	Ralf Gross <Ralf-Lists@...fgross.de>
CC:	linux-kernel@...r.kernel.org
Subject: Re: io-scheduler tuning for better read/write ratio

On 06/16/2009 02:40 PM, Ralf Gross wrote:
> David Newall schrieb:
>> Ralf Gross wrote:
>>> write throughput is much higher than the read throughput (40 MB/s
>>> read, 90 MB/s write).
> 
> Hm, but I get higher read throughput (160-200 MB/s) if I don't write
> to the device at the same time.
> 
> Ralf

How specifically are you testing? It could depend a lot on the particular access patterns you're using to test.

--CJD
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