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Re: Current state of filesystem features / improvements
On Sun, Nov 28, 2010 at 07:18:59PM -0500, Greg Troxel wrote:
> "Aaron J. Grier" <agrier%poofygoof.com@localhost> writes:
> > I was my understanding that background fsck uses snapshots, which are
> > orthogonal to softdeps. perhaps I am incorrect?
> I believe that snapshots are for backups, and background fsck requires a
> fs that can operate in any state that could have been created by power
You are both correct. The kernel requires a non-corrupt file system
for mounting a boot time (softdeps) and fsck requires a non-changing
image for the duration of its run (snapshots). At the end of the
fsck run the results are "merged".
(or at least that's how I understand background fsck without ever
having even peeked at the code)
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