From: Olaf Kirch <okir@suse.de>
To: Harald Hannelius <harald+nfs@arcada.fi>
Cc: nfs@lists.sourceforge.net
Subject: Re: Poor NFS performance, kernel 2.6.6.
Date: Fri, 28 May 2004 15:55:15 +0200 [thread overview]
Message-ID: <20040528135515.GG5657@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.58.0405280953240.29286@penti.sit.fi>
[2.6 over loopback nfs]
> real 6m21.086s
> user 0m1.712s
> sys 0m5.454s
[2.4 over loopback nfs]
> real 1m11.875s
> user 0m1.730s
> sys 0m7.730s
This roughly matches some performance issues I've been seeing on a 2.6.5
kernel. Are you using reiser or ext3?
In general, dd to a local file is much different from what NFS does,
because nfsd flushes data to disk.
The NFS client will usually issue a COMMIT call roughly every 1 Meg,
so the following should mimic the behavior of nfsd a little better,
when run on your file system locally
iozone -s 1g -r 1m -o -i 0
Higher numbers indicate better performance.
Could you run this on 2.4 and 2.6, please?
Olaf
--
Olaf Kirch | The Hardware Gods hate me.
okir@suse.de |
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next prev parent reply other threads:[~2004-05-28 13:58 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-27 10:31 Poor NFS performance, kernel 2.6.6 Harald Hannelius
[not found] ` <200405271251.22746.vincent.roqueta@ext.bull.net>
2004-05-27 12:17 ` Harald Hannelius
2004-05-27 12:45 ` Vincent ROQUETA
2004-05-27 12:39 ` Dexter Filmore
2004-05-27 13:03 ` Harald Hannelius
2004-05-27 18:07 ` Bernd Schubert
2004-05-27 19:01 ` Trond Myklebust
2004-05-27 20:56 ` Harald Hannelius
2004-05-27 22:09 ` Trond Myklebust
2004-05-28 7:17 ` Harald Hannelius
2004-05-28 13:55 ` Olaf Kirch [this message]
2004-05-28 16:57 ` Phy Prabab
2004-05-28 18:03 ` Harald Hannelius
2004-05-28 19:19 ` Trond Myklebust
2004-06-01 0:16 ` Yusuf Goolamabbas
2004-06-02 6:57 ` Trond Myklebust
-- strict thread matches above, loose matches on Subject: below --
2004-05-27 13:16 Harald Hannelius
2004-06-02 12:33 Jeffrey Layton
2004-06-02 13:00 ` Greg Banks
2004-06-02 13:40 ` Jeffrey Layton
2004-06-02 13:14 ` Vincent ROQUETA
2004-06-02 14:53 ` Jeffrey Layton
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