From: christophe.caron@jouy.inra.fr Subject: Small UDP frame Date: Tue, 25 Apr 2006 18:20:41 +0200 (CEST) Message-ID: Reply-To: christophe.caron@jouy.inra.fr Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1FYQHY-0000nO-Mz for nfs@lists.sourceforge.net; Tue, 25 Apr 2006 09:20:56 -0700 Received: from diorite.jouy.inra.fr ([138.102.119.181]) by mail.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1FYQHW-0001M9-3z for nfs@lists.sourceforge.net; Tue, 25 Apr 2006 09:20:56 -0700 Received: from diamant (diamant [138.102.1.1]) by diorite.jouy.inra.fr (/8.13.6) with ESMTP id k3PGKexN023216 for ; Tue, 25 Apr 2006 18:20:40 +0200 (CEST) To: nfs@lists.sourceforge.net 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: Hello We've a cluster under Sun Grid Engine with a data NFS server and we've some performance problems on the server (it seems this is IO problems). It seems we've also many,many smalls UDP packets between the node and the NFS server (5000 packet in 10 seconds...) #tcpdump -v host server 18:13:26.212996 IP (tos 0x0, ttl 64, id 54076, offset 0, flags [DF], length: 140) server.nfs > n46.797: UDP, length: 112 18:13:26.213459 IP (tos 0x0, ttl 64, id 42208, offset 0, flags [DF], length: 140) n46.797 > server.nfs: UDP, length: 112 Actually i've no more idea about the performance problems. NFS which block IO ? How could i get more information about this network trafic ? The data partition is mounted with noatime option. Any clue ? thanks cc Prenez note de ma nouvelle adresse : christophe.caron@jouy.inra.fr *********************************************************** Christophe Caron - INRA Mathematique, Informatique et Genome Domaine de Vilvert 78350 Jouy-en-Josas Web: http://migale.jouy.inra.fr/ Tel: 01-34-65-28-88 Email: christophe.caron@jouy.inra.fr *********************************************************** ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs