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Date: Tue, 13 Mar 2007 14:35:55 -0400
From: Bill Moran <wmoran@potentialtech.com>
To: "Pietro Cerutti" <pietro.cerutti@gmail.com>
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Cc: questions@freebsd.org
Subject: Re: UFS2 Snapshot limitiations
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In response to "Pietro Cerutti" <pietro.cerutti@gmail.com>:

> On 3/13/07, Doug Poland <doug@polands.org> wrote:
> >
> > On Tue, March 13, 2007 10:10, Bill Moran wrote:
> > > In response to "Doug Poland" <doug@polands.org>:
> > >
> > >> Hello,
> > >>
> > >> I seem to recall, but cannot find, the limitation on the number of
> > >> snapshots allowed on UFS2.  Could someone point me in the right
> > >> direction please?
> > >
> > > The handbook has it:
> > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/snapshots.html
> > >
> > Thank you very much.
> >
> 
> Sorry for joining the thread, but it's raised my curiosity: what's the
> reason for this limit?

I'm not 100% sure, but I believe it's because snapshot information is stored
in the filesystem superblock, and that's all that can fit in the space
available in the superblock.

-- 
Bill Moran
http://www.potentialtech.com