From: Orion Poplawski <orion@cora.nwra.com>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: linux-nfs@vger.kernel.org
Subject: Re: Client performance questions
Date: Thu, 13 Dec 2007 21:24:18 -0700 [thread overview]
Message-ID: <47620572.4020501@cora.nwra.com> (raw)
In-Reply-To: <1197593822.7964.8.camel-rJ7iovZKK19ZJLDQqaL3InhyD016LWXt@public.gmane.org>
Trond Myklebust wrote:
> On Thu, 2007-12-13 at 17:07 -0700, Orion Poplawski wrote:
>> Trond Myklebust wrote:
>>> Have you tried increasing the value
>>> in /proc/sys/fs/nfs/nfs_congestion_kb ?
>> Well, I just came across this message while trying to improve NFS
>> performance locally. On my F8 client, it is set to 30400 by default.
>> Changing to 60800 kills performance. Writes go from ~20MB/s to ~5MB/s,
>> reads from ~80MB/s to ~47MB/s as measured by bonnie++.
>>
>> Expected?
>
> UDP? If so, then possibly yes. UDP has lousy congestion control, so if
> the server gets too busy to respond, then performance dies.
Nope, TCP. w/rsize is 32k. Server is pretty lightly loaded. Server is
RHEL4.5.
--
Orion Poplawski
Technical Manager 303-415-9701 x222
NWRA/CoRA Division FAX: 303-415-9702
3380 Mitchell Lane orion@cora.nwra.com
Boulder, CO 80301 http://www.cora.nwra.com
next prev parent reply other threads:[~2007-12-14 4:34 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-10 21:52 Client performance questions Fredrik Lindgren
[not found] ` <0a15723c4b267d4eb8b5ad05800315c0-FpffG6+3qsA@public.gmane.org>
2007-12-10 23:10 ` Trond Myklebust
[not found] ` <1197328226.25938.7.camel-rJ7iovZKK19ZJLDQqaL3InhyD016LWXt@public.gmane.org>
2007-12-14 0:07 ` Orion Poplawski
2007-12-14 0:57 ` Trond Myklebust
[not found] ` <1197593822.7964.8.camel-rJ7iovZKK19ZJLDQqaL3InhyD016LWXt@public.gmane.org>
2007-12-14 4:24 ` Orion Poplawski [this message]
2007-12-10 23:26 ` Jeff Layton
2007-12-11 15:37 ` Aaron Wiebe
[not found] ` <e7ca40f70712110737x698b35a8g32377485cc7d8a16-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2007-12-11 17:03 ` Chuck Lever
2007-12-11 17:11 ` Aaron Wiebe
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