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Date:      Thu, 21 Sep 2000 14:46:10 -0700
From:      David Greenman <dg@root.com>
To:        Terry Lambert <tlambert@primenet.com>
Cc:        tuinstra@clarkson.edu (Dwight Tuinstra), freebsd-fs@FreeBSD.ORG (freebsd-fs)
Subject:   Re: Journaling Filesystems in bsd? (LFS, anyone?) 
Message-ID:  <200009212146.OAA10470@implode.root.com>
In-Reply-To: Your message of "Thu, 21 Sep 2000 21:14:59 -0000." <200009212114.OAA17206@usr08.primenet.com> 

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>>    Have you done any comparisons with FFS+softupdates? The goal of softupdates
>> was to be as fast or faster than LFS for everything, not require a cleanerd,
>> and along with "snapshots" eliminate requiring fsck before system startup.
>
>Soft updates can not get around the full fsck problem.  See my other
>posting under the title "Crash recovery", wherein I compare the crash
>recovery mechanisms, with special attention to the soft updates
>problem with abbreviated crash recovery.
>
>Soft updates does some good things, but it also does some bad things
>(at least relative to an LFS or JFS, and crash recovery).

   I didn't say it could. What I said is that it didn't need to be run before
system startup occured.

-DG

David Greenman
Co-founder, The FreeBSD Project - http://www.freebsd.org
President, TeraSolutions, Inc. - http://www.terasolutions.com
Pave the road of life with opportunities.


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