From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Staubach Subject: Re: Re: NFS synchronization problems on Beowulf cluster Date: Thu, 01 Jun 2006 11:56:45 -0400 Message-ID: <447F0E3D.9070809@redhat.com> References: <447EF8CA.3020200@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: nfs@lists.sourceforge.net Return-path: Received: from [10.3.1.94] (helo=sc8-sf-list2-new.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1FlpXb-00042c-SY for nfs@lists.sourceforge.net; Thu, 01 Jun 2006 08:56:55 -0700 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 1FlpXb-0003yL-OT for nfs@lists.sourceforge.net; Thu, 01 Jun 2006 08:56:55 -0700 Received: from mx1.redhat.com ([66.187.233.31]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1FlpXa-0004ch-KJ for nfs@lists.sourceforge.net; Thu, 01 Jun 2006 08:56:55 -0700 To: Mario Storti In-Reply-To: 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: Mario Storti wrote: >Peter Staubach redhat.com> writes: > > > >>What is the local file system type being exported on the NFS servers? >> >> > >It is software RAID mounted on top of XFS. At first time we suspected >of this combination, and the first thing we do is to clone the system >on a plain ext3 filesystem without RAID. The cloned cluster with two >nodes exhibited exactly the same behaviour, so we don't think now that >the problem is in the combination of NFS with RAID+XFS. It ssems to be >something in the NFS setup/configuration itself. > I see. I see from the nfsstat output that this job mix is _very_ heavily write intensive. I might suspect that this may be contributing to the issue being seen. The consistency for files is very relaxed when those files are being written to. Are any special mount parameters being used? Thanx... ps ------------------------------------------------------- All the advantages of Linux Managed Hosting--Without the Cost and Risk! Fully trained technicians. The highest number of Red Hat certifications in the hosting industry. Fanatical Support. Click to learn more http://sel.as-us.falkag.net/sel?cmd=lnk&kid=107521&bid=248729&dat=121642 _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs