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Date:      Mon, 24 May 1999 04:19:35 -0500 (EST)
From:      Alfred Perlstein <bright@rush.net>
To:        Narvi <narvi@haldjas.folklore.ee>
Cc:        fs@FreeBSD.ORG
Subject:   Re: reference for filesystem with btree layout?
Message-ID:  <Pine.BSF.3.96.990524041815.9491Q-100000@cygnus.rush.net>
In-Reply-To: <Pine.BSF.3.96.990524101108.3570A-100000@haldjas.folklore.ee>

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On Mon, 24 May 1999, Narvi wrote:

> 
> On Sat, 22 May 1999, Alfred Perlstein wrote:
> 
> > 
> > anyone have a url to a discussion about such a creation?
> > 
> 
> No.
> 
> > I don't much care for the sequential layout of directories in FFS
> > and was interested in alternatives.
> > 
> 
> Presently ffs uses ufs code for directory related operations. It should be
> possible (and not too hard at my reading of it back when I had a similar
> idea) to replace them.

It would change the on disk structure otherwise there would be a lot
of extra IO involved no?

> > also, specifically in FreeBSD, I don't see a reason why a filesystem can't 
> > take ownership of multiple block devices, is there a reason?
> >
> 
> What's the need? You can stripe the block devices with ccd (or concat
> with vinum) and get the same result.

the point would be to at runtime add more backing block devices
to expand or migrate the filesystem.

-Alfred



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