From: Petr Baudis <pasky@suse.cz>
Date: Wed, 18 Oct 2006 00:42:09 GMT
Subject: Re: VCS comparison table
Message-ID: <20061018004209.GL20017__44651.6417236582$1161134941$gmane$org@pasky.or.cz>
In-Reply-To: <4535778D.40006@utoronto.ca>

Dear diary, on Wed, Oct 18, 2006 at 02:38:37AM CEST, I got a letter
where Aaron Bentley <aaron.bentley@utoronto.ca> said that...
> Petr Baudis wrote:
> >> this only makes sense if
> >> you have a fast access to the repository (otherwise, you consider your
> >> local repository as a cache, and you're ready to pay the disk space
> >> price to save your bandwidth). In this case, it's often in your
> >> filesystem (local or NFS).
> > 
> > So how is the light checkout actually implemented? Do you grab the
> > complete new snapshot each time the remote repository is updated?
> 
> No, the lightweight checkouts store very little.  They have
> - a copy of tree shape (filenames, paths, sha1 sums) from the last
>   commit.
> - a copy of tree shape for the current working directory
> - a map from stat values to sha-1 hashes

I see, I guess that means "the index file and tree objects for the last
commit" in git-speak. Thanks.

> > Do all
> > the (at least read-only, like "log" and "diff", perhaps "status")
> > commands work on such a light checkout?
> 
> Yes.  And if you check out from a read-write branch, all write commands,
> work, too.

Ok, one last question - do you do most of the work locally, fetching
bits of data as you need, or remotely, only taking input/producing
output over the network (the pserver model)?

-- 
				Petr "Pasky" Baudis
Stuff: http://pasky.or.cz/
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