svn binary deltas: can they be tuned or sth?..

Hi

I'm having problems using "tar -cvf" and "gzip -f --rsyncable" to save
two entire filesystems into two repositories.

It isn't as space-efficient as it's supposed to be.
Basically the repos end up looking like this:

# ls -l /repos/repos/*/db/revs/
/repos/repos/test1/db/revs/:
total 1556652
-rw-r--r-- 1 nobody nogroup 115 Feb 6 08:09 0
-rw-r--r-- 1 nobody nogroup 786399319 Feb 6 08:31 1
-rw-r--r-- 1 nobody nogroup 806034124 Feb 10 00:53 2

/repos/repos/test2/db/revs/:
total 1304596
-rw-r--r-- 1 nobody nogroup 115 Feb 6 08:09 0
-rw-r--r-- 1 nobody nogroup 697837468 Feb 6 08:44 1
-rw-r--r-- 1 nobody nogroup 636746962 Feb 10 01:08 2

As you can see, Subversion's delta algorithm doesn't really work as I
had expected it to :-).
Any clue as to why?

(The difference between the filesystem's state at commit time for
commit 1 and 2 is that I've run "emerge --sync" and "emerge -D world",
applying one week's worth of minor OS updates to the filesystems..)

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Received on Thu Feb 9 21:48:22 2006