Date: Mon, 27 Aug 2001 11:28:35 -0400 (EDT) From: Robert Watson <rwatson@FreeBSD.ORG> To: Rex Luo <rexluo@synology.com> Cc: freebsd-fs@FreeBSD.ORG Subject: Re: quick question: softupdate - metadata logging & data logging? Message-ID: <Pine.NEB.3.96L.1010827112729.42016A-100000@fledge.watson.org> In-Reply-To: <200108270936.RAA13906@synology.com>
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Take a look at: http://www.usenix.org/publications/library/proceedings/usenix2000/general/seltzer.html This paper by Seltzer, et al, compares the semantics and performance of journalling and soft updates, and was presented at USENIX in 2000. Robert N M Watson FreeBSD Core Team, TrustedBSD Project robert@fledge.watson.org NAI Labs, Safeport Network Services On Mon, 27 Aug 2001, Rex Luo wrote: > Dear, > > Sorry to not survey thoroughly, and maybe someone can give me some information > quickly. > > Since Filesystem logging can be 3 common forms:(Solaris interinals Core Kernel > Architecture Jim Mauro. Richard McDougall) > > 1. Metadata logging -- logs only file system structure changes > 2. File and metadata loggging -- Logs all changes to the filesystem > 3. Log-structured file system -- The entire file system is implemented as a log > > I remember I have seem on mailinglist that FFS with softupdate has similar > function as journal filesystem. What kind of journal filesystem it can be? > or I am totally wrong. > > Thanks > > -- > > -- Rex Luo > > Tel : 886-2-25521814 Ext. 824 > Fax : 886-2-25521824 > e-mail : rexluo@synology.com > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-fs" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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