From: Trond Myklebust <trond.myklebust@fys.uio.no>
To: Pavel@Janik.cz (Pavel Janík)
Cc: linux-kernel@vger.kernel.org
Subject: Re: NFS client with sync mount option to sloooow
Date: 07 Mar 2003 16:52:46 +0100 [thread overview]
Message-ID: <shsof4nnpgx.fsf@charged.uio.no> (raw)
In-Reply-To: <m3d6l3s1hb.fsf@Janik.cz>
>>>>> " " == Pavel Jan <Pavel@Janik.cz> writes:
> 2.4.20:~ mount -o tcp,sync PowerVault:/Share /mnt 2.4.20:~ time
> dd if=/tmp/kcore of=/mnt
> This took unbelievable amount of 21minutes! Reverse direction
> is OK!
> I tried to "upgrade" the kernel on 600SC from 2.4.10-SuSE
Wake up and read the spec. When you do sync writes, NFS has to commit
writes to disk on the server *BEFORE* it is allowed to reply to the
client. Adding GigE won't help the server one bit when the bottleneck
lies in the fact that it has to spin up the disk for every request.
Cheers,
Trond
prev parent reply other threads:[~2003-03-07 15:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-07 14:19 NFS client with sync mount option to sloooow Pavel Janík
2003-03-07 15:52 ` Trond Myklebust [this message]
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