From owner-freebsd-stable@FreeBSD.ORG Wed Jun 8 12:31:40 2005 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8D97A16A41C for ; Wed, 8 Jun 2005 12:31:40 +0000 (GMT) (envelope-from pda@crc.u-strasbg.fr) Received: from mailhost.u-strasbg.fr (mailhost.u-strasbg.fr [130.79.200.153]) by mx1.FreeBSD.org (Postfix) with ESMTP id A2B9843D49 for ; Wed, 8 Jun 2005 12:31:39 +0000 (GMT) (envelope-from pda@crc.u-strasbg.fr) Received: from vagabond.ma.maison (vagabond.u-strasbg.fr [IPv6:2001:660:2402:1001:208:2ff:fedc:616a]) by mailhost.u-strasbg.fr (8.13.1/jtpda-5.5pre1) with ESMTP id j58CVbfv068638 for ; Wed, 8 Jun 2005 14:31:37 +0200 (CEST) Received: from vagabond.ma.maison (localhost [127.0.0.1]) by vagabond.ma.maison (8.13.3/jtpda-5.4) with ESMTP id j58CVb2I007016 for ; Wed, 8 Jun 2005 14:31:37 +0200 (CEST) Received: (from pda@localhost) by vagabond.ma.maison (8.13.3/8.13.3/Submit) id j58CVbv6007015 for freebsd-stable@freebsd.org; Wed, 8 Jun 2005 14:31:37 +0200 (CEST) (envelope-from pda) Date: Wed, 8 Jun 2005 14:31:37 +0200 From: Pierre DAVID To: freebsd-stable@freebsd.org Message-ID: <20050608123137.GA6872@vagabond.ma.maison> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.9i X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-1.6 (mailhost.u-strasbg.fr [IPv6:2001:660:2402::153]); Wed, 08 Jun 2005 14:31:37 +0200 (CEST) X-Antivirus: scanned by sophos at u-strasbg.fr Subject: Show stopper for large disks with 5.4-RELEASE X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 Jun 2005 12:31:40 -0000 Hi, we are setting up a mail server for ~50 000 users, with around 1.8TB on a DAS storage (HP MSA 500). We were planning to use FreeBSD (5.4-RELEASE), as with all other servers in our machine room. However, we are encountering a show stopper: after an unclean shutdown, the snapshot that fsck creates is taking too much time (more than 20 minutes). During the most part of this time, all I/O are frozen on this large disk, so the server cannot serve our clients. Our SLA constraints do not allow us to have these recovery times. The options used to create the file system were standard sysinstall options. During normal operations, performances are very good. Our tests showed that Linux doesn't present the same problem. With ReiserFS, the reboot after crash takes only 20 seconds to read the journal and recover the file system. Is the snapshot time for large volumes a known problem? We don't see such a long time with smaller file systems. Do you have a clue to help us use FreeBSD and not switch on Linux for this service? Philippe Pegon & Pierre David