Date: Tue, 15 Dec 1998 16:49:44 -0500 (EST) From: Alfred Perlstein <bright@hotjobs.com> To: John Polstra <jdp@polstra.com> Cc: Matthew Dillon <dillon@apollo.backplane.com>, hackers@FreeBSD.ORG Subject: Re: idea/help w. mirroring Message-ID: <Pine.BSF.4.05.9812151648520.27793-100000@bright.fx.genx.net> In-Reply-To: <XFMail.981215132930.jdp@polstra.com>
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On Tue, 15 Dec 1998, John Polstra wrote: > On 15-Dec-98 Matthew Dillon wrote: > > > Hmmm. At BEST, we do a sort of stacking. We break the CVS > > tree out into a source tree on a read-only partition. We > > then construct /usr/src by 'layering' it over the read-only > > source tree by reconstructing the directory structure in a > > r+w partition and making each source file a softlink to the > > read-only 'backing store'. > > > > When we need to make a local hack, we break the softlink. When > > we update the underlying source, we diff any broken softlinks > > and fold in changes as appropriate. It aint perfect, but > > it allows us to maintain local hacks while simultaniously > > preventing us from accidently corrupting the source tree. > > I'm curious -- have you tried amd's "union" filesystem type? It tries > to automate what you're doing. I've played around with it a little > bit, but haven't attempted to use it on a large scale. Are UNION mounts safe again? That would be really great. Alfred Perlstein - Programmer, HotJobs Inc. - www.hotjobs.com -- There are operating systems, and then there's FreeBSD. -- http://www.freebsd.org/ 3.0-current > 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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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