From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Whiting Subject: Re: 2.4.20rc1 NFS V3 UDP client problems -- (not a problem now) Date: Mon, 18 Nov 2002 11:59:47 -0700 Sender: nfs-admin@lists.sourceforge.net Message-ID: <3DD938A3.682C38E3@amis.com> References: <200211142033.gAEKXGHe010083@pookie.nersc.gov> <3DD42E26.A603AD36@amis.com> <20021114181149.J20258@redhat.com> <3DD4305B.D439C6CD@amis.com> <20021114182320.K20258@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: canon@pookie.nersc.gov, Trond Myklebust , "nfs@lists.sourceforge.net" Return-path: Received: from dermis.amis.com ([207.141.5.253]) by sc8-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 18Dr66-00089M-00 for ; Mon, 18 Nov 2002 10:58:14 -0800 To: Benjamin LaHaise Errors-To: nfs-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Unsubscribe: , List-Archive: Ben, I found a 64Bit/66Mhz PCI bus and the jumbo frames are working fine. Same kernel, same network cards, same Netapp 825 filer -- simply a different motherboard. Here are the NFS client read/write speeds for my setup. The write speeds appear to be somewhat limited by the netapps 825 disk/cpu speed. I wish I had a netapps 9xx to test. TCP UDP READ 99MB/s 104MB/s WRITE 36MB/s 49MB/s UDP looks good with my current setup -- but with the gigE running jumbo frames in the 32 bit PCI bus the UDP was sick on the reads -- 1MB/s. Read testing is: while(true);do mount blaa;dd if=path of=/dev/null bs=x count=y;umount blaa;done where bs/count equal a 500M file -- to use the netapps cache. Write testing is: dd if=/dev/zero of=file bs=1M Network rates monitored using netapps syststat and the time results. eric Benjamin LaHaise wrote: > I'd guess you're hitting the PCI bandwidth limitations then, as the larger > packets permit greater throughput, which in turn drives up bus utilizations. > If you've got any disk controllers on the same bus, that would definately > explain the problem (or any other devices on the bus that are in use). > > -ben ------------------------------------------------------- This sf.net email is sponsored by: To learn the basics of securing your web site with SSL, click here to get a FREE TRIAL of a Thawte Server Certificate: http://www.gothawte.com/rd524.html _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs