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Re: Official Git mirror?


From: Eli Zaretskii
Subject: Re: Official Git mirror?
Date: Wed, 23 Feb 2011 07:32:51 -0500

> From: Giorgos Keramidas <address@hidden>
> Newsgroups: gnu.emacs.help
> Date: Wed, 23 Feb 2011 10:16:10 +0100
> 
> I started a new 'bzr branch' this morning, when I got to the office,
> using the nosmart option.  It's been running for more than an hour now,
> it has transferred 500 MB of data, and all this on a laptop running
> Ubuntu 10.10 LTS with ample free disk space and connected to the very
> fast internal network of Google.

Like I said, the nosmart operation moves about 780MB of data on the
initial "bzr branch" command.  The resulting branch directory is
around 690MB.  With git, I get 632MB and 780MB respectively (but that
includes all the branches, so it should be larger).

> This is a *lot* of data for something that is supposed to fetch only the
> trunk of Emacs.

The trunk (or, actually, the first branch you download into a shared
repository) brings in the bulk of the revision history.  Additional
branches are mush smaller and their checkouts are much faster, because
they share a lot of revisions with the trunk, and "bzr branch" then
brings only the revisions that are not on the trunk.  Try another
branch command for emacs-23, for example.

> It took 3989.501 real / 581.270 user / 15.990 sys
> seconds to fetch everything and the resulting .bzr/ directory contains
> 233 MB of data:
> 
>   address@hidden:~/bzr/trunk$ du -sh .bzr/
>   233M    .bzr/

About an hour is what we can get now, yes (I got as little as 16 min,
but that was on a system sitting on the same LAN as
bzr.savannah.gnu.org; otherwise, I get between 0:45 and 1:10).

> This is not very fast, but I'll keep using the bzr branch to see how
> future updates go.

Please don't forget NOT to use nosmart+ after the initial branch
command.



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