Date: Thu, 6 Dec 2001 21:09:38 -0300 (ART) From: Fernando Gleiser <fgleiser@cactus.fi.uba.ar> To: BSD Freak <bsd-freak@mbox.com.au> Cc: FreeBSD Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: Journaling File Systems and Soft Updates confusion Message-ID: <20011206203128.K10197-100000@cactus.fi.uba.ar> In-Reply-To: <63ba6e639af8.639af863ba6e@mbox.com.au>
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On Fri, 7 Dec 2001, BSD Freak wrote: > Hi all, > The whole point of a journaling file system on systems such as > Linux/NT/Solaris etc. is not to increase performance but rather to > avoid an 'fsck' when the server gets shutdown "uncleanly". This is > because fsck can take several hours to run on a very large filesystem. In CURRENT, you can run fsck in background. Just wait until 5.0 is out =0) > > FreeBSD's ffs curently cannot do this (avoid an fsck) with or without > soft updates. Soft updates of FreeBSD is merely there to increase > performance. Nope. Soft Updates are a way to ensure file system consistency after a crash. > > I may have this all wrong (someone please correct me if I have) but > soft updates is NOT an equivalent to a journaling file system. Go and read the paper by Seltzer, McKusik et al (see my earlier post) comparing both. Then you'll know if you are wrong or not =0). Fer > > > > --------------------------------------------------------------------- > It is automatic log-in and notification. > It is the all NEW mBeeper! > http://www.mbox.com.au/mbeeper > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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