-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2/22/2011 9:41 AM, anatoly techtonik wrote: > On Fri, Feb 18, 2011 at 4:00 PM, Dirkjan Ochtman <dirk...@ochtman.nl> wrote: >> On Fri, Feb 18, 2011 at 14:41, anatoly techtonik <techto...@gmail.com> wrote: >>> Do you have a public list of stuff to be done (i.e. Roadmap)? >>> BTW, what is the size of Mercurial clone for Python repository? >> >> There is a TODO file in the pymigr repo (though I think that is >> currently inaccessible). > > Can you provide a link? I don't know where to search. Should we open a > src.python.org domain? > >> I don't have a recent optimized clone to check the size of, yet. > > What is the size of non-optimized clone then? I know that a clone of > such relatively small project as MoinMoin is about 250Mb. ISTM that > Python repository may take more than 1GB, and that's not acceptable > IMHO. BTW, what do you mean by optimization - I hope not stripping the > history?
Mercurial repositories are sensitive to the order that data is inserted into them. So re-ordering the topological insert can dramatically improve compression. The quick overview is that in a given file's history, each diff is computed to the previous text in that file. So if you have a history like: foo | \ foo baz bar foo | / baz foo bar This can be stored as either: foo +bar -bar +baz +bar This matters more if you have a long divergent history for a while: A |\ B C | | D E | | F G : : X Y |/ Z In this case, you could end up with contents that look like: A +B +D +F +X -BDFX+C +E +G +Y +ABDFXZ Or you could have the history 'interleaved': A +B -B+C -C+BD -BD+CE -BDF+CEG -... There are tools that take a history file, and rewrite it to be more compact. I don't know much more than that myself. But especially with something like an svn conversion which probably works on each revision at a time, where people are committing to different branches concurrently, I would imagine the conversion could easily end up in the pessimistic case. John =:-> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Cygwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1j6qoACgkQJdeBCYSNAAPzPgCdEOJsHf4Xf4lZH+jHX42FQb8J sQoAn3JuCmDcsyv0JZpXtbVJoGewA+7t =M8DI -----END PGP SIGNATURE----- _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
