From: Casey Dahlin <cdahlin@redhat.com>
To: Ralf Gross <Ralf-Lists@ralfgross.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: io-scheduler tuning for better read/write ratio
Date: Tue, 16 Jun 2009 14:43:39 -0400 [thread overview]
Message-ID: <4A37E7DB.7030100@redhat.com> (raw)
In-Reply-To: <20090616184027.GB7043@p15145560.pureserver.info>
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
next prev parent reply other threads:[~2009-06-16 18:46 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-16 15:43 io-scheduler tuning for better read/write ratio Ralf Gross
2009-06-16 16:41 ` David Newall
2009-06-16 18:40 ` Ralf Gross
2009-06-16 18:43 ` Casey Dahlin [this message]
2009-06-16 18:56 ` Ralf Gross
2009-06-16 20:16 ` Jeff Moyer
2009-06-22 14:43 ` Jeff Moyer
2009-06-22 16:31 ` Ralf Gross
2009-06-22 19:42 ` Jeff Moyer
2009-06-23 7:24 ` Ralf Gross
2009-06-23 13:53 ` Jeff Moyer
2009-06-24 7:25 ` Ralf Gross
2009-06-24 7:57 ` Al Boldi
2009-06-25 7:26 ` Ralf Gross
2009-06-25 13:45 ` Al Boldi
2009-06-25 7:27 ` Ralf Gross
2009-06-26 2:19 ` Wu Fengguang
2009-06-26 10:44 ` Jens Axboe
2009-06-27 3:46 ` Wu Fengguang
2009-06-29 9:47 ` Ralf Gross
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4A37E7DB.7030100@redhat.com \
--to=cdahlin@redhat.com \
--cc=Ralf-Lists@ralfgross.de \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.