From: Brad Barnett Subject: Re: knfsd brought to its knees, by a simple rsync or cp operation Date: Tue, 1 Mar 2005 18:10:07 -0500 Message-ID: <20050301181007.382a1422@be.back.l8r.net> References: <20050226082854.2a496ec3@be.back.l8r.net> <20050228100633.GA4822@suse.de> <20050228102307.3788a184@be.back.l8r.net> <20050228154455.GS4822@suse.de> <20050228112018.34fdeb2b@be.back.l8r.net> <20050301095548.GJ14402@suse.de> <20050301065703.7e52cf4e@be.back.l8r.net> <20050301143732.GA22324@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.12] helo=sc8-sf-mx2.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1D6GVZ-00083f-6s for nfs@lists.sourceforge.net; Tue, 01 Mar 2005 15:10:29 -0800 Received: from l8r.net ([64.26.155.43] ident=aliens) by sc8-sf-mx2.sourceforge.net with esmtp (TLSv1:DES-CBC3-SHA:168) (Exim 4.41) id 1D6GVE-0003ue-SA for nfs@lists.sourceforge.net; Tue, 01 Mar 2005 15:10:28 -0800 Received: from be.back.l8r.net (bbarnett@be [10.10.10.10]) by l8r.net (8.12.3/8.12.3/Debian-7.1) with ESMTP id j21N9Nuu011779 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO) for ; Tue, 1 Mar 2005 18:09:23 -0500 To: nfs@lists.sourceforge.net In-Reply-To: <20050301143732.GA22324@suse.de> Sender: nfs-admin@lists.sourceforge.net Errors-To: nfs-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Post: List-Help: List-Subscribe: , List-Archive: On Tue, 1 Mar 2005 15:37:32 +0100 Olaf Kirch wrote: > On Tue, Mar 01, 2005 at 06:57:03AM -0500, Brad Barnett wrote: > > Within 10 seconds, the output of ls -R /home slows. Within 20 > > seconds, it_stop_. It then sits there for seconds, and spews out a > > page in small jumps. Again, a ls /raid/home on the _server_ barely > > slows, and is constant. > > > > I'm really scratching my head here. > > Well, it sounds like something's eating the network bandwidth, > or otherwise interfering with nfsd responsiveness. Again, are > you using UDP or TCP? If UDP, look at nfsstat output to see if > you have a high retransmit count. > In my original post, I did mention that I can copy large files (isos) over the network at excellent speeds. That is, I get over 6M/sec transfer speed... > If it's really a problem with scheduling, it should make a difference > if you run the rsync job with lower priority, and/or renice the > nfsd threads to run with higher priority. You can't really renice the kernel nfsd threads though :(( ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs