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Date:      Wed, 27 Oct 1999 13:05:22 -0400 (EDT)
From:      Don <don@calis.blacksun.org>
To:        Greg Lehey <grog@lemis.com>
Cc:        Alfred Perlstein <bright@wintelcom.net>, freebsd-fs@FreeBSD.ORG
Subject:   Re: Journaling
Message-ID:  <Pine.BSF.4.05.9910271300460.35360-100000@calis.blacksun.org>
In-Reply-To: <19991027095431.45462@mojave.worldwide.lemis.com>

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> 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.
Again this is a result of UFS on top of FFS (AFAIK). You can not have more
than 7 UFS slices per FFS partition. (Please forgive any mistaken
references here as I should not be near this computer with the flu that I
appear to have.)

> 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.
What good is the ability to grow a partition without the ability to shrink
another? (That is rhetorical. I realize that when adding a disk it will
help but in the case of "I ran out of space and I need to expand this FS
into that one it does not help")

> > 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 :-)
Agreed but I would like to try. I also do not like the softupdates license
(again unless it has changed) as I want a fs that I can distribute with
the os instead of as an add on. 

> You might also take a look at SGI's xfs.
Again I would love to but the license will not be compatible and I would
prefer not to contaminate this project. I intend to use XFS as a feature
reference but not as a code reference.

-don



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