Messages in this thread | | | Date | Sat, 06 Jan 2007 23:10:45 -0500 | From | Jeff Garzik <> | Subject | Re: [KORG] Re: kernel.org lies about latest -mm kernel |
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Nigel Cunningham wrote: > Hi. > > On Tue, 2006-12-26 at 08:49 -0800, H. Peter Anvin wrote: >> Nigel Cunningham wrote: >>> Hi. >>> >>> I've have git trees against a few versions besides Linus', and have just >>> moved all but Linus' to staging to help until you can get your new >>> hardware. If others were encouraged to do the same, it might help a lot? >>> >> Not really. In fact, it would hardly help at all. >> >> The two things git users can do to help is: >> >> 1. Make sure your alternatives file is set up correctly; >> 2. Keep your trees packed and pruned, to keep the file count down. >> >> If you do this, the load imposed by a single git tree is fairly negible. > > Sorry for the slow reply, and the ignorance... what's an alternatives > file? I've never heard of them before.
It's highly useful but poorly documented method of referencing repository B's objects from repository A.
When you clone locally
git clone --reference linus-2.6 linus-2.6 nigel-2.6
it will create nigel-2.6 with zero objects, and an alternatives file pointing to 'linus-2.6' local repository. When you commit, only the objects not already in linus-2.6 will be found in nigel-2.6.
It's far better "git clone -l ..." because you don't even have the additional hardlinked inodes, and don't have to run "git relink" locally.
Jeff
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