From owner-freebsd-stable Tue Jul 23 16: 0:33 2002 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 2C52237B400 for ; Tue, 23 Jul 2002 16:00:30 -0700 (PDT) Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id DB05E43E42 for ; Tue, 23 Jul 2002 16:00:29 -0700 (PDT) (envelope-from dillon@apollo.backplane.com) Received: from apollo.backplane.com (localhost [127.0.0.1]) by apollo.backplane.com (8.12.5/8.12.4) with ESMTP id g6NN0SCV061744; Tue, 23 Jul 2002 16:00:28 -0700 (PDT) (envelope-from dillon@apollo.backplane.com) Received: (from dillon@localhost) by apollo.backplane.com (8.12.5/8.12.4/Submit) id g6NN0Skh061743; Tue, 23 Jul 2002 16:00:28 -0700 (PDT) (envelope-from dillon) Date: Tue, 23 Jul 2002 16:00:28 -0700 (PDT) From: Matthew Dillon Message-Id: <200207232300.g6NN0Skh061743@apollo.backplane.com> To: "Mark W. Krentel" Cc: freebsd-stable@FreeBSD.ORG Subject: Re: 4.6-RC: Glacial speed of dump backups References: <200207232247.g6NMl3533962@dreamscape.com> Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG :I asked about this on -hackers last week. In Linux, the 2.4 kernels :make it impossible for ext2 dump to always see the correct versions of :some files, even if there are no writes during the dump. : : http://old.lwn.net/2001/0503/a/lt-dump.php3 : http://old.lwn.net/2001/0503/a/lt-metadata.php3 : :Are you saying Freebsd has the same problem? I know that dump will :have problems when the file system is changing during the dump, but :the Linux problems go far beyond that. I did some simple tests and :everything works as I'd expect in Freebsd, although it's easy to make :Linux fall over. : :--Mark If the filesystem is idle you'll be O.K. w/FreeBSD. I do not know of any issues with Linux that make it any different from FreeBSD. If you sync a couple of times dumping an idle filesystem under Linux ought to work just about the same as dumping an idle filesystem under FreeBSD. Note that I completely agree with Linus in regards to dump. Its time is long past. We definitely need something better. -Matt Matthew Dillon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message