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Date:      Tue, 15 Dec 1998 09:53:50 -0800 (PST)
From:      John Polstra <jdp@polstra.com>
To:        eivind@yes.no
Cc:        hackers@FreeBSD.ORG
Subject:   Re: idea/help w. mirroring
Message-ID:  <199812151753.JAA16545@vashon.polstra.com>
In-Reply-To: <19981214232905.R5444@follo.net>
References:  <Pine.BSF.4.05.9812141636350.27793-100000@bright.fx.genx.net>

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In article <19981214232905.R5444@follo.net>,
Eivind Eklund  <eivind@yes.no> wrote:
> On Mon, Dec 14, 1998 at 04:39:42PM -0500, Alfred Perlstein wrote:
> > 
> > Has anyone written something that could be used to intercept all calls to
> > write out file modification and give the modifications to a userland
> > application?
> > 
> > I'm interested in the most efficient method of doing filesystem mirroring,
> > passing that info into a userland app using multicast would be ideal.
> > 
> > The userland app may see which blocks of which file have been modified and
> > distribute deltas across the network.

Something like that would also be useful to reduce the load on
primary CVSup server hosts such as freefall.

> Stacking layer.

Ha ha ha, how about something that actually works, as opposed to
"sounds good in the McKusick book"?  As far as I can tell, there's not
a single stackable filesystem in FreeBSD that works well enough to use
in practice.

John
-- 
  John Polstra                                               jdp@polstra.com
  John D. Polstra & Co., Inc.                        Seattle, Washington USA
  "Nobody ever went broke underestimating the taste of the American public."
                                                            -- H. L. Mencken

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