Mercurial > hg
view tests/test-verify.t @ 24735:07200e3332a1
tags: extract .hgtags filenodes cache to a standalone file
Resolution of .hgtags filenodes values has historically been a
performance pain point for large repositories, where reading individual
manifests can take over 100ms. Multiplied by hundreds or even thousands
of heads and resolving .hgtags filenodes becomes a performance issue.
This patch establishes a standalone cache file holding the .hgtags
filenodes for each changeset. After this patch, the .hgtags filenode
for any particular changeset should only have to be computed once
during the lifetime of the repository.
The introduced hgtagsfnodes1 cache file is modeled after the rev branch
cache: the cache is effectively an array of entries consisting of a
changeset fragment and the filenode for a revision. The file grows in
proportion to the length of the repository (24 bytes per changeset) and
is truncated when the repository is stripped. The file is not written
unless tag info is requested and tags have changed since last time.
This patch partially addresses issue4550. Future patches will split the
"tags" cache file into per-filter files and will refactor the cache
format to not capture the .hgtags fnodes, as these are now stored in
the hgtagsfnodes1 cache. This patch is capable of standing alone. We
should not have to wait on the tags cache filter split and format
refactor for this patch to land.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Wed, 15 Apr 2015 17:42:38 -0400 |
parents | b32a30da608d |
children | 4d2b9b304ad0 |
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prepare repo $ hg init a $ cd a $ echo "some text" > FOO.txt $ echo "another text" > bar.txt $ echo "more text" > QUICK.txt $ hg add adding FOO.txt adding QUICK.txt adding bar.txt $ hg ci -mtest1 verify $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files 3 files, 1 changesets, 3 total revisions verify with journal $ touch .hg/store/journal $ hg verify abandoned transaction found - run hg recover checking changesets checking manifests crosschecking files in changesets and manifests checking files 3 files, 1 changesets, 3 total revisions $ rm .hg/store/journal introduce some bugs in repo $ cd .hg/store/data $ mv _f_o_o.txt.i X_f_o_o.txt.i $ mv bar.txt.i xbar.txt.i $ rm _q_u_i_c_k.txt.i $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files data/FOO.txt.i@0: missing revlog! 0: empty or missing FOO.txt FOO.txt@0: f62022d3d590 in manifests not found data/QUICK.txt.i@0: missing revlog! 0: empty or missing QUICK.txt QUICK.txt@0: 88b857db8eba in manifests not found data/bar.txt.i@0: missing revlog! 0: empty or missing bar.txt bar.txt@0: 256559129457 in manifests not found 3 files, 1 changesets, 0 total revisions 9 integrity errors encountered! (first damaged changeset appears to be 0) [1] $ cd ../../.. $ cd .. test changelog without a manifest $ hg init b $ cd b $ hg branch foo marked working directory as branch foo (branches are permanent and global, did you want a bookmark?) $ hg ci -m branchfoo $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files 0 files, 1 changesets, 0 total revisions test revlog corruption $ touch a $ hg add a $ hg ci -m a $ echo 'corrupted' > b $ dd if=.hg/store/data/a.i of=start bs=1 count=20 2>/dev/null $ cat start b > .hg/store/data/a.i $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files a@1: broken revlog! (index data/a.i is corrupted) warning: orphan revlog 'data/a.i' 1 files, 2 changesets, 0 total revisions 1 warnings encountered! 1 integrity errors encountered! (first damaged changeset appears to be 1) [1] $ cd .. test revlog format 0 $ "$TESTDIR/revlog-formatv0.py" $ cd formatv0 $ hg verify repository uses revlog format 0 checking changesets checking manifests crosschecking files in changesets and manifests checking files 1 files, 1 changesets, 1 total revisions $ cd ..