From: Jeff King Date: Sat, 08 Aug 2009 07:30:42 GMT Subject: Re: [PATCH 0/5] Suggested for PU: revision caching system to significantly speed up packing/walking Message-ID: <20090808073042.GA20951@coredump.intra.peff.net> In-Reply-To: On Sat, Aug 08, 2009 at 09:27:55AM +0200, Nick Edelen wrote: > > IIRC from previous discussions, kernel.org's main performance problem is > > I/O, not CPU. Are there any provisions for sharing rev-caches between > > similar repositories, as we already do for objects? > > I haven't implemented a transmission protocol or anything, but it > would be perfectly possible to copy cache slices from one repo to > another. Generating the revision cache from scratch on large repos > can take several minutes, so this wouldn't be a bad idea. That might be useful, but I was thinking more of an "alternates"-like mechanism between repos. So that the data is stored only once on disk and in the disk cache, which is helpful for sites like kernel.org which serve many similar repositories. -Peff