Hello,
I'm trying to avoid doing delta compression on a number of large binary files.
I got a suggestion to use $GIT_DIR/info/attributes and a line like this:
*.bin -delta
This doesn't seem to show a big improvement (and honestly I can't find where in
the git-pack-objects source the value of this attribute is used).
Could someone shed some light on this attribute and any other improvements I
could make for efficiently serving up a repo over git-daemon with near-weekly
revisions of 100MB+ files?
Thanks,
Nasser
Nasser Grainawi venit, vidit, dixit 19.10.2009 20:47:
Nasser Grainawi wrote:
quoted
Hello,
I'm trying to avoid doing delta compression on a number of large binary
files. I got a suggestion to use $GIT_DIR/info/attributes and a line
like this:
*.bin -delta
This doesn't seem to show a big improvement (and honestly I can't find
where in the git-pack-objects source the value of this attribute is used).
Could someone shed some light on this attribute and any other
improvements I could make for efficiently serving up a repo over
git-daemon with near-weekly revisions of 100MB+ files?
Thanks,
Nasser
ping? any help? anyone?
Well, describing a reproducable test case would help... as well as
telling us your git version.
builtin-pack-objects.c certainly refers to the delta attribute, see
no_try_delta() and its callers.
Have you checked your attrs with git-check-attr? How do you measure the
improvements you expect?
Michael
Michael J Gruber wrote:
Nasser Grainawi venit, vidit, dixit 19.10.2009 20:47:
quoted
Nasser Grainawi wrote:
quoted
Hello,
I'm trying to avoid doing delta compression on a number of large binary
files. I got a suggestion to use $GIT_DIR/info/attributes and a line
like this:
*.bin -delta
This doesn't seem to show a big improvement (and honestly I can't find
where in the git-pack-objects source the value of this attribute is used).
Could someone shed some light on this attribute and any other
improvements I could make for efficiently serving up a repo over
git-daemon with near-weekly revisions of 100MB+ files?
Thanks,
Nasser
ping? any help? anyone?
Well, describing a reproducable test case would help... as well as
telling us your git version.
1.6.5
builtin-pack-objects.c certainly refers to the delta attribute, see
no_try_delta() and its callers.
Oops, somehow missed that while looking at the code right above it. Thanks.
Have you checked your attrs with git-check-attr? How do you measure the
improvements you expect?
I did check, it returns 'unset' like one would expect.
I guess the big problem is that I don't have a good test case. I would have
expected a 'git repack -adf' to spend less time saying "Compressing objects",
but that doesn't seem to be happening...
Oh, wait, never mind.
I was missing some of the binaries I was trying to skip. Adding some more
exceptions to the attributes file dropped the "Compressing objects" time from
20 minutes (or more) to maybe 10 seconds.
Thanks Michael!
Nasser