Date: Fri, 08 Apr 2005 08:11:36 -0700 (PDT) From: John Polstra <jdp@polstra.com> To: Colin Percival <colin.percival@wadham.ox.ac.uk> Cc: freebsd-arch@freebsd.org Subject: Re: Adding bsdiff to the base system Message-ID: <XFMail.20050408081136.jdp@polstra.com> In-Reply-To: <4254E2E9.2090504@wadham.ox.ac.uk>
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On 07-Apr-2005 Colin Percival wrote: > The reason portsnap is more efficient lies in how portsnap and CVSup > determine which files need to be updated. The ports tree contains > roughly 71000 files, and the first thing the CVSup client does is list > all of these files and send that list to the server. > > In contrast, portsnap has an index file -- containing, roughly speaking, > that same list -- and the portsnap client merely sends the sha256 hash of > this index file to the server, which responds with either "I recognize > that index -- here's a patch which will turn it into the latest index" > or "I don't recognize that -- here's the new index". Nice! John
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