From owner-freebsd-current@FreeBSD.ORG Fri Jul 22 13:53:34 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0551F16A45C; Fri, 22 Jul 2005 13:53:34 +0000 (GMT) (envelope-from e-masson@kisoft-services.com) Received: from mallaury.nerim.net (smtp-105-friday.noc.nerim.net [62.4.17.105]) by mx1.FreeBSD.org (Postfix) with ESMTP id B5D8C43DB0; Fri, 22 Jul 2005 13:53:28 +0000 (GMT) (envelope-from e-masson@kisoft-services.com) Received: from srvbsdnanssv.interne.kisoft-services.com (kisoft.net1.nerim.net [62.212.107.51]) by mallaury.nerim.net (Postfix) with ESMTP id 431254F3E8; Fri, 22 Jul 2005 15:53:17 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by srvbsdnanssv.interne.kisoft-services.com (Postfix) with ESMTP id 80CFAC675; Fri, 22 Jul 2005 15:53:43 +0200 (CEST) Received: from srvbsdnanssv.interne.kisoft-services.com ([127.0.0.1]) by localhost (srvbsdnanssv.interne.kisoft-services.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 58715-04; Fri, 22 Jul 2005 15:53:39 +0200 (CEST) Received: by srvbsdnanssv.interne.kisoft-services.com (Postfix, from userid 1001) id 1206FC667; Fri, 22 Jul 2005 15:53:39 +0200 (CEST) To: Eric Anderson From: Eric Masson In-Reply-To: <42E0E39E.8020009@centtech.com> (Eric Anderson's message of "Fri, 22 Jul 2005 07:16:30 -0500") References: <42DD64AB.3000605@centtech.com> <20050720094830.GR782@marvin.riggiland.au> <42DE3C1F.9070704@centtech.com> <20050720130523.GT782@marvin.riggiland.au> <42E0E39E.8020009@centtech.com> X-Operating-System: FreeBSD 5.4-RELEASE-p2 i386 Date: Fri, 22 Jul 2005 15:53:39 +0200 Message-ID: <86irz32bh8.fsf@srvbsdnanssv.interne.kisoft-services.com> User-Agent: Gnus/5.1006 (Gnus v5.10.6) XEmacs/21.4 (Jumbo Shrimp, berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 8bit X-Virus-Scanned: amavisd-new at interne.kisoft-services.com Cc: freebsd-fs@freebsd.org, "Thomas E. Zander" , freebsd-current@freebsd.org Subject: Re: mksnap_ffs takes 4-5 minutes? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Jul 2005 13:53:34 -0000 Eric Anderson writes: Hi, > I know for certain that one test filesystem (2Tb) had nothing on it, > no processess using the filesystem at all, and it took well over an > hour to run mksnap on it. I made some tests on a Dell PowerVault 725N with ŕ 5.2 about a year and a half ago. Snapshots on a 700GB filesystem were taking roughly half an hour. > Maybe mksnap is broken somehow? Don't think broken is the right term, but it surely lacks optimization on huge filesystems when compared to snapshots on a netapp filer (5 seconds on a terabyte volume for example). For medium size fs like the 80B I'm using here on my desktop box, approximately 30 seconds seems reasonable to me. Shorter time would be welcome, sure ;) Éric Masson -- Contresens. Le contenu de la signature doit respecter la charte du NG sur *tous* les sujets. Aussi bien la pub que la Netiquette. C'est pas une zone de non-droit, les 4 lignes de signature. -+- Lapin in : Oui-Oui casque bleu ŕ Neuneuland -+-