From: Phil Garcia Subject: high load Date: Fri, 18 Apr 2003 14:48:44 -0500 Sender: nfs-admin@lists.sourceforge.net Message-ID: <20030418194844.GB29491@oppie.phys.uwm.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from oppie.phys.uwm.edu ([129.89.57.60] helo=oppie ident=mail) by sc8-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 196brJ-0006N6-00 for ; Fri, 18 Apr 2003 12:49:17 -0700 Received: from apgarcia by oppie with local (Exim 3.35 #1 (Debian)) id 196bqm-0007hJ-00 for ; Fri, 18 Apr 2003 14:48:44 -0500 To: nfs@lists.sourceforge.net 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: Hi, We've come across a problem that seems related to the interaction between NFS and a 3ware 7500-8 running RAID 5 with one hot spare. We have a test program that opens a file and then loops, writing up to 255 bytes to the file and then sleeping for up to 10 seconds. We run around 200 instances of the program simultaneously for about 25 minutes. When we run the processes on 200 separate slaves, writing to a (reiserfs) directory under the 3ware controller, the load on the server shoots up to over 20 and then gradually declines over the next 5 minutes or so. When we run the processes on 200 separate slaves, writing to a different disk/directory (again reiserfs) on the same NFS server, the load stays fine. When we run 200 processes locally on the server, writing to the directory under the 3ware controller, again the load stays low. Any insights would be much appreciated... ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs