Date: Wed, 27 Oct 1999 09:54:31 -0400 From: Greg Lehey <grog@lemis.com> To: Don <don@calis.blacksun.org>, Alfred Perlstein <bright@wintelcom.net> Cc: freebsd-fs@FreeBSD.ORG Subject: Re: Journaling Message-ID: <19991027095431.45462@mojave.worldwide.lemis.com> In-Reply-To: <Pine.BSF.4.05.9910270728390.34993-100000@calis.blacksun.org>; from Don on Wed, Oct 27, 1999 at 07:36:38AM -0400 References: <Pine.BSF.4.05.9910262214040.12797-100000@fw.wintelcom.net> <Pine.BSF.4.05.9910270728390.34993-100000@calis.blacksun.org>
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On Wednesday, 27 October 1999 at 7:36:38 -0400, Don wrote: >> Kirk McKusick has been working for the last year or so on >> a combination of "soft-updates" (complete) and "snapshots" >> (not released yet), once complete FFS will have the equivelant >> of logging AND snapshots like the netapp appliance. > > I am familiar with softupdates but not with snapshots. The reason for > starting a new project was basically to once and for all get rid of UFS. > While there is nothing wrong with UFS it does have some limitations which > I would like to eliminate such as a limit of 7 slices. I think you're mixing things up here. Journalling and the number of slices available have nothing to do with anything. Anyway, the Vinum layer effectively removes this limitation. > I would also like to add functionality such as the ability to grow > and shrink partitions etc. There is currently a project underway to grow file systems. Nobody's been interested enough to shrink them (which is a lot more work), but I'd guess it would be less difficult than writing a whole new fs. > Softupdates is also not recommended for use on the root partition > and it still seems to be just a little flaky. Possibly, but it's not clear that it will ever be flakier than a new file system :-) > Every once in a while I wind up with a problem which I have traced > to softupdates but which I could not recreate. (To be fair I have > not had a problem in a month or two now) > >> In so far as codebase there is the LFS project, currently >> fixed (afaik) in NetBSD, perhaps porting that to FreeBSD >> would be worthwhile. > > This is indeed going to be the starting point for this project but I hope > I would be able to take it far beyond this. You might also take a look at SGI's xfs. Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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