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RE: Merge: poor performance / slowness; out of memory error

From: McHenry, Matt <mmchenry_at_carnegielearning.com>
Date: Wed, 3 Sep 2008 16:24:47 -0400

> Until then, the only work-around you have it probably to use svn
> propedit to add your revision to the existing svn:mergeinfo property
> ... carefully.

        I've read a lot of the documentation surrounding merge-tracking,
and it's got me pretty scared of modifying svn:mergeinfo by hand. :)
So I've been thinking of two other work-arounds. Can anyone offer
opinions on whether they're likely to get me into more or less trouble
than hand-editing svn:mergeinfo?

        Context: repository looks like this, with /branches/my-branch a
copy of /trunk_at_SOME-PAST-REV (made w/ a 1.4 client, if that matters):

                   /baz <-- lots of files and directories under here,
but no changes on the branch

1) Use sparse working copies:
        a) To block revisions, 'svn co --depth=empty trunk' and then run
the necessary 'svn merge --record-only' commands in that working copy.
        b) For the actual merge, construct a working copy with
--depth=infinite for /trunk/foo and /trunk/bar and --depth=empty for
/baz, and run the merge in it.

2) Do piece-wise merging: instead of running one 'svn merge' command in
a working copy of trunk, run two 'svn merge' commands, one in a working
copy of /trunk/foo and one in a working copy of /trunk/bar (with
appropriate source URLs).

        My sense is that (1) is a bit more future-proof, because the
svn:mergeinfo at the root has a better chance of being sensible --
whereas with (2), when some future more-efficient client tries to
construct svn:mergeinfo for the root by eliding the svn:mergeinfo on all
the subdirs, it won't work very well.

Again, thanks for your continued help!

Matt McHenry
412-690-2442 x150
Software Developer
Carnegie Learning, Inc.
Learning By Doing (r)
Helping over 500,000 students in 2,600 schools to succeed in math.

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Received on 2008-09-03 22:25:01 CEST

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