view tests/fixtures/symlinks.sh @ 931:e1dbd9646d6a

svnwrap: use custom StringIO class in get_file() The wrappers were calling ra.get_file() with a cStringIO object. Empirically, svn 1.7.5 is writing 16kB blocks to the stream object, and cStringIO reallocates its internal buffer and doubles its size whenever it is filled. With large committed files this requires two large memory blocks at the same time. SimpleStringIO implements the mimimum StringIO interface used by ra.get_file() but instead stores all the blocks and "join" them at the end. It means more fragmentation but requires only one large block, without overallocation. Also, 16kB blocks should be friendly to most allocators. In practice, this simple change let me convert a revision containing multiple moderately large files, the largest being around 450MB, with a 32-bits Windows setup, python 2.7, swig svn 1.7.5, in stupid mode, while it was previously aborting with "not enough memory". The same revision still fails in replay mode.
author Patrick Mezard <patrick@mezard.eu>
date Sun, 16 Sep 2012 19:31:49 +0200
parents b37c401b7f92
children
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#!/bin/sh
#
# Generate symlinks.svndump
#

mkdir temp
cd temp

mkdir project-orig
cd project-orig
mkdir trunk
mkdir branches
cd ..

svnadmin create testrepo
svnurl=file://`pwd`/testrepo
svn import project-orig $svnurl -m "init project"

svn co $svnurl project
cd project/trunk
echo a > a
ln -s a linka
ln -s a linka2
mkdir d
ln -s a d/linka
svn add a linka linka2 d
svn ci -m "add symlinks"
# Move symlinks
svn mv linka linkaa
svn mv d d2
svn commit -m "moving symlinks"
# Update symlinks (test "link " prefix vs applydelta)
echo b > b
rm linkaa
ln -s b linkaa
rm d2/linka
ln -s b d2/linka
svn ci -m "update symlinks"
# Replace a symlink with a regular file
rm linkaa
echo data > linkaa
svn propdel svn:special linkaa
# Replace another symlink with a regular file in another way
# It should mark linka2 as R(eplaced)
svn rm linka2
echo data2 > linka2
svn add linka2
svn propdel svn:special linka2
svn rm d2/linka
svn ci -m "undo link"
cd ../..

svnadmin dump testrepo > ../symlinks.svndump