From owner-freebsd-fs Sun Feb 1 05:15:43 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id FAA05912 for freebsd-fs-outgoing; Sun, 1 Feb 1998 05:15:43 -0800 (PST) (envelope-from owner-freebsd-fs@FreeBSD.ORG) Received: from magicnet.magicnet.net (root@magicnet.magicnet.net [204.96.116.9]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id FAA05907 for ; Sun, 1 Feb 1998 05:15:41 -0800 (PST) (envelope-from bill@bilver.magicnet.net) Received: from bilver.magicnet.net (uucp@localhost) by magicnet.magicnet.net (8.8.6/8.8.6) with UUCP id IAA05516 for freebsd-fs@freebsd.org; Sun, 1 Feb 1998 08:13:26 -0500 (EST) Received: (from bill@localhost) by bilver.magicnet.net (8.8.5/8.7.3) id IAA15329 for freebsd-fs@freebsd.org; Sun, 1 Feb 1998 08:02:42 -0500 (EST) From: Bill Vermillion Message-Id: <199802011302.IAA15329@bilver.magicnet.net> Subject: Re: Filesystem hacking In-Reply-To: <199801311727.LAA13881@x115-105.reshalls.umn.edu> from "mikk0022@maroon.tc.umn.edu" at "Jan 31, 98 11:27:19 am" To: freebsd-fs@FreeBSD.ORG Date: Sun, 1 Feb 1998 08:02:42 -0500 (EST) X-Mailer: ELM [version 2.4ME+ PL31 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-fs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org X-To-Unsubscribe: mail to majordomo@FreeBSD.org "unsubscribe freebsd-fs" Recently mikk0022@maroon.tc.umn.edu said: > On Fri, 30 Jan 1998 14:52:27 -0600 "Alton, Matthew" wrote > >I have decided to code up an IBM-style journaling filesystem > >(jfs) with maximum portability for free unices. ... ... > What do you know about LFS for FreeBSD. I haven't used > it, but from what I understand, it was an early implementation > of a "log-structured filesystem" for BSD. Are "log-structured" > and "journaling" synonymous? > I know that SGI's XFS is a hybrid, where each filesystem has a log > which stores committed operations on the filesystem. The filesystem > is a fairly normal filesystem from what I understand. .... I don't know a great deal about the XFS, but it's not 'fairly normal' in some respects. It does appear to be robust. However I had some tracks go bad on an HD and fx wasn't able to read and recover them so they were left there bad. fsck won't run ons xfs as it's nots needed. The only cure for this problem is to backup the system and remake the filesystem. I will say that it is darned fast however. We're going to be moving virutally all of the web sites from the SGI's to FreeBSD and Apache with the exception of the catalog sites. (the package runs only on NT, SGI's Irix, Sun's Solaris. The HP/UX port is almost done) -- bill@bilver.magicnet.net | bill@bilver.com