From: Jakub Narebski <jnareb@gmail.com>
Date: Wed, 18 Oct 2006 00:48:49 GMT
Subject: Re: VCS comparison table
Message-ID: <200610180248.49713.jnareb__4216.28244589574$1161134967$gmane$org@gmail.com>
In-Reply-To: <4535778D.40006@utoronto.ca>

Aaron Bentley wrote:
> 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

Ah. So in git terminology it stores index and working directory
(and perhaps the name of branch). 

-- 
Jakub Narebski
Poland