Date: Wed, 12 Feb 2003 21:07:21 -0800 From: Brooks Davis <brooks@one-eyed-alien.net> To: Terry Lambert <tlambert2@mindspring.com> Cc: Darren Pilgrim <dmp@pantherdragon.org>, Matthew Emmerton <matt@gsicomp.on.ca>, David Schultz <dschultz@uclink.Berkeley.EDU>, Daxbert <daxbert_news@dweebsoft.com>, Bill Moran <wmoran@potentialtech.com>, Heinrich Rebehn <rebehn@ant.uni-bremen.de>, freebsd-questions@FreeBSD.ORG, freebsd-fs@FreeBSD.ORG Subject: Re: Why is there no JFS? Message-ID: <20030212210721.A9481@Odin.AC.HMC.Edu> In-Reply-To: <3E4B138F.26E32E75@mindspring.com>; from tlambert2@mindspring.com on Wed, Feb 12, 2003 at 07:40:00PM -0800 References: <3E4A863E.2030801@potentialtech.com> <3E4A8EF5.1070308@ant.uni-bremen.de> <3E4A9712.8030609@potentialtech.com> <3E4AA331.5040701@ant.uni-bremen.de> <3E4AA734.5040102@potentialtech.com> <045401c2d2db$f9d45c30$0a0aa8c0@dweebsoft.com> <20030212225631.GA10375@HAL9000.homeunix.com> <005801c2d2eb$aa5fae60$1200a8c0@gsicomp.on.ca> <3E4ADDDE.5040208@pantherdragon.org> <3E4B138F.26E32E75@mindspring.com>
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--45Z9DzgjV8m4Oswq Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Feb 12, 2003 at 07:40:00PM -0800, Terry Lambert wrote: > Darren Pilgrim wrote: > > Not really. A properly laid-out filesystem hierarchy will result in no > > writes to / (except for installworld/kernel). That removes the problem > > that journalling addresses, and is probably why softupdates is disabled > > by default for /. For large, active filesystems, journalling would be a > > big improvement when you had to run a foreground fsck. >=20 > Soft updates are disable on / by default because of the chicken > and egg problem of runing tunefs on /. There's no chicken and egg problem when you're booting off install media or for that matter from single user mode. The problem was that softupdates means you don't get space back from deleted files immediatly so previously / tended to fillup during installworld or installkernel. I know some fixes have been implemented in that area, but I'm not sure if then mean you can always write to the space occupied by unlinked files or just that you have a better chance. -- Brooks --=20 Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4 --45Z9DzgjV8m4Oswq Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE+SygIXY6L6fI4GtQRAo3wAJ92P2bZ+09ft0P9v0VEKrL5w1n4vgCgkRZB vbtK7h3KQKhvXCBWaiThyow= =SfH5 -----END PGP SIGNATURE----- --45Z9DzgjV8m4Oswq-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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