From owner-freebsd-questions@FreeBSD.ORG Tue Mar 10 08:30:56 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D87A81065672 for ; Tue, 10 Mar 2009 08:30:56 +0000 (UTC) (envelope-from kheuer2@gwdg.de) Received: from tmailer.gwdg.de (tmailer.gwdg.de [134.76.10.23]) by mx1.freebsd.org (Postfix) with ESMTP id 9C7248FC38 for ; Tue, 10 Mar 2009 08:30:56 +0000 (UTC) (envelope-from kheuer2@gwdg.de) Received: from gwdu60.gwdg.de ([134.76.8.60]) by mailer.gwdg.de with esmtps (TLSv1:AES256-SHA:256) (Exim 4.69) (envelope-from ) id 1LgxMV-0003fV-3Z for freebsd-questions@freebsd.org; Tue, 10 Mar 2009 09:30:55 +0100 Date: Tue, 10 Mar 2009 09:30:54 +0100 (CET) From: Konrad Heuer To: freebsd-questions@freebsd.org Message-ID: <20090310091318.W34669@gwdu60.gwdg.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Level: - X-Virus-Scanned: (clean) by exiscan+sophie Subject: Is NFS Locking Reliable? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Mar 2009 08:30:57 -0000 I'd like to ask for your experiences with NFS locking in larger environments. Our experiences are not so satisfying. Our NFS servers for user home directories are on FreeBSD (6.4), MacOSX (10.5), Linux (still 2.4 kernel) and Tru64-UNIX boxes; NFS clients are mostly Linux (2.6 kernel) and FreeBSD (6.4, 7.0, but w/o kernel lockd) systems. There are periods of several days without problems, but from time to time, on one, two, or several (but not all) clients application processes which use locking suddenly hang in kernel mode - namely firefox, opera, pine. It seems to be no specific operating system problem - all combinations of clients and servers are involved. There are some suspicious facts that out network may cause problems although not all ip subnets are protected by cisco firewall modules. But there may be other circumstances which could lead to sporadic packet losses or whatever else ... So, if anyone has similar or other experiences with NFS locking, I'm very interested in reading about! Thank you very much in advance! Konrad Heuer GWDG, Am Fassberg, 37077 Goettingen, Germany, kheuer2@gwdg.de