From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Dickson Subject: Re: Unable to copy large files to NFS server Date: Mon, 31 Jul 2006 12:43:15 -0400 Message-ID: <44CE3323.3080502@RedHat.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Cc: nfs@lists.sourceforge.net Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list2-new.sourceforge.net with esmtp (Exim 4.43) id 1G7arb-0002pR-4U for nfs@lists.sourceforge.net; Mon, 31 Jul 2006 09:43:31 -0700 Received: from mx1.redhat.com ([66.187.233.31]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1G7arb-0006zt-Af for nfs@lists.sourceforge.net; Mon, 31 Jul 2006 09:43:31 -0700 To: Dan McNulty In-Reply-To: List-Id: "Discussion of NFS under Linux development, interoperability, and testing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: nfs-bounces@lists.sourceforge.net Errors-To: nfs-bounces@lists.sourceforge.net Dan McNulty wrote: > Hi, > = > = > = > We have recently purchased a new EMC NAS solution. I have successfully = > configured our newer (Fedora4) servers to access this successfully. > = > = > = > However we have a number of RedHat 7.2 servers (kernel 2.4.18), which I = > have successfully mounted to the Server, and can copy small files OK. = > However, when I try to copy larger files to the Server, the system just = > hangs, and then the mount becomes unusable; I=92m unable to kill the hung = > process and cannot unmount. I have tried to edit the rsize/wsize options = > but this hasn=92t worked. The current entry in /etc/fstab looks like this: > = > = > = > Servername:/path1/path2/Production /mnt/Production nfs = > rsize=3D4096,wsize=3D4096,nfsvers=3D3 0 0 > = > = > = > In /var/log/messages I see lots of these errors: > = > = > = > Jul 31 16:29:51 client1 kernel: nfs: server Servername not responding, = > still trying > = > Jul 31 16:31:40 client1 kernel: nfs: task 189 can't get a request slot > = > Jul 31 16:31:40 client1 kernel: nfs: task 190 can't get a request slot > = > = > = > The main problem is that I can write small files and it works OK. As = > soon as I try to transfer a larger file, the client writes a 0 byte file = > to the server (with the correct filename) then just hangs. I then can=92t = > do anything with the mount. Any help on what I should be looking at = > would be much appreciated! Are you using UDP or TCP mounts? If udp, switch to TCP.. also, use 'tethereal -w /tmp/data.pcap host ' to capture this hang to see which side stop sending (meaning is the client waiting for a reply or is the server waiting for another request). I know in the past, EMC server had an issue with how FC and RHEL kernels handled ESTALE messages... but I doubt that is happening in this case... but you might want to rummage around in both bug database (assuming you have access to EMC's) and see if this a known issue and if there is a fix to it.. steved. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=3Djoin.php&p=3Dsourceforge&CID=3DDE= VDEV _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs