From mboxrd@z Thu Jan  1 00:00:00 1970
From: Fyodor Ustinov <ufm@ufm.su>
Subject: Re: read performance not perfect
Date: Sat, 06 Aug 2011 00:12:48 +0300
Message-ID: <4E3C5CD0.6060100@ufm.su>
References: <CABAwU-YJ8DFjphavMQ+NjqPU7=fFBtwsEMzE7xT1G8gp4LywSA@mail.gmail.com>	<Pine.LNX.4.64.1107181012540.22215@cobra.newdream.net>	<CABAwU-YKmEC=umFLzDb-ykPbzQ9s3sKoUmQbkumExrXEwyveNA@mail.gmail.com>	<Pine.LNX.4.64.1108040846500.17151@cobra.newdream.net>	<loom.20110804T213454-854@post.gmane.org>	<Pine.LNX.4.64.1108041252230.26398@cobra.newdream.net>	<4E3B2D78.5060605@ufm.su>	<Pine.LNX.4.64.1108041825230.29841@cobra.newdream.net>	<4E3B8F0E.20606@ufm.su>	<Pine.LNX.4.64.1108050905350.12301@cobra.newdream.net>	<4E3C44DC.9090906@ufm.su> <Pine.LNX.4.64.1108051315420.12301@cobra.newdream.net>
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To: Sage Weil <sage@newdream.net>
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On 08/05/2011 11:17 PM, Sage Weil wrote:
> On Fri, 5 Aug 2011, Fyodor Ustinov wrote:
>> On 08/05/2011 07:07 PM, Sage Weil wrote:
>>> This is the problem.  The readahead patches in the master branch of
>>> git://ceph.newdream.net/git/ceph-client.git.  They're not upstream yet.
>>> Sorry that wasn't clear!
>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=e9852227431a0ed6ceda064f33e4218757acab6c
>> - it's not this patch?
> Nope, it's ebd62c49c0a71a9af6b92b4f0cedfd2b1d46c16e, in ceph-client.git.
> Then d0a287e18a81a0314a9aa82b6f54eb7f5ecabd60 bumps up the default rasize
> window.
>
> FWIW I saw a big jump in read spead on my cluster (now fully saturates the
> client interface).
>
> sage
Well. I wait net kernel. :)

WBR,
     Fyodor.