From: Olaf Kirch <okir@suse.de>
Subject: Re: knfsd brought to its knees, by a simple rsync or cp operation
Date: Mon, 28 Feb 2005 11:06:33 +0100
Message-ID: <20050228100633.GA4822@suse.de>
References: <20050226082854.2a496ec3@be.back.l8r.net>
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Cc: nfs@lists.sourceforge.net
To: Brad Barnett <lists@L8R.net>
In-Reply-To: <20050226082854.2a496ec3@be.back.l8r.net>
Sender: nfs-admin@lists.sourceforge.net
Errors-To: nfs-admin@lists.sourceforge.net

On Sat, Feb 26, 2005 at 08:28:54AM -0500, Brad Barnett wrote:
> There is obviously something wacky in the way the kernel is scheduling
> things here.  Any ideas, patches, suggestions?

That's because knfsd will write things to disk synchronously unless you
tell it not to. That can throttle other NFS activity in two locations:

 -	by tying up all knfsd threads on the server. Try to bump the
 	number of nfsd processes

 -	by tying up all RPC slots on the client. Make sure your wsize
 	isn't too big (8k is reasonable)

Olaf
-- 
Olaf Kirch   |  --- o --- Nous sommes du soleil we love when we play
okir@suse.de |    / | \   sol.dhoop.naytheet.ah kin.ir.samse.qurax


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