On Thu, Nov 13, 2008 at 11:46 PM, Frederic Bouvier <[EMAIL PROTECTED]> wrote:
> BTW, are you aware the use of SVN implies that a second copy of
> each file is kept in a hidden directory, and makes the scenery
> directory two times bigger than a directory fetched with rsync
> or ftp ?

Yes, svn is approximately double the local disk footprint of rsync.
Both svn and rsync use a chunk size that is 1% of that used by FTP.
You're still better off with SVN unless you routinely fly at least
3000 km of distance in each 10x10 tarball you download.  Without going
closer than 300 km to any other area already flown over.  Most people
will not achieve that level of utilization, especially if they're
either choosing routes for scenic sights or for realistic IFR tracks.

A note in the documentation is probably a good idea.  Anyone who just
wants a snapshot of the whole planet for offline flight would be
better off retrieving all the tarballs by FTP.  Nobody mentioned any
plans to turn down the ftp service, and I certainly haven't been
expecting either rsync or svn to replace that bulk option.

PS.  There may be a clever option for subversion that avoids keeping
duplicate files for directories that are not currently being modified
(like cvs does).  But if there is, I don't yet know about it.  If
anyone comes across such a thing, we should change the terrasync
source code.  8-)

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