Mercurial > hg
view tests/test-transaction-rollback-on-revlog-split.t @ 50311:e2ba2234bf1c stable
revlog: update the split + transaction test
We add section, increase the amount of comments and simplify some of the
constructs. We are about to build more on top this tests so lets do a small
cleanup first.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Thu, 16 Mar 2023 20:37:11 +0100 |
parents | ccd9cb73125c |
children | c185545a4c69 |
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Test correctness of revlog inline -> non-inline transition ---------------------------------------------------------- Helper extension to intercept renames and kill process $ cat > $TESTTMP/intercept_before_rename.py << EOF > import os > import signal > from mercurial import extensions, util > > def extsetup(ui): > def close(orig, *args, **kwargs): > path = util.normpath(args[0]._atomictempfile__name) > if path.endswith(b'/.hg/store/data/file.i'): > os.kill(os.getpid(), signal.SIGKILL) > return orig(*args, **kwargs) > extensions.wrapfunction(util.atomictempfile, 'close', close) > EOF $ cat > $TESTTMP/killme.py << EOF > import os > import signal > > def killme(ui, repo, hooktype, **kwargs): > os.kill(os.getpid(), signal.SIGKILL) > EOF setup a repository for tests ---------------------------- $ cat >> $HGRCPATH << EOF > [format] > revlog-compression=none > EOF $ hg init troffset-computation $ cd troffset-computation $ printf '%20d' '1' > file $ hg commit -Aqma $ printf '%1024d' '1' > file $ hg commit -Aqmb $ printf '%20d' '1' > file $ hg commit -Aqmc $ dd if=/dev/zero of=file bs=1k count=128 > /dev/null 2>&1 $ hg commit -AqmD Reference size: $ f -s file file: size=131072 $ f -s .hg/store/data/file* .hg/store/data/file.d: size=132139 .hg/store/data/file.i: size=256 $ cd .. Test a hard crash after the file was split but before the transaction was committed =================================================================================== Test offset computation to correctly factor in the index entries themselves. Also test that the new data size has the correct size if the transaction is aborted after the index has been replaced. Test repo has commits a, b, c, D, where D is large (grows the revlog enough that it transitions to non-inline storage). The clone initially has changes a, b and will transition to non-inline storage when adding c, D. If the transaction adding c, D is rolled back, then we don't undo the revlog split, but truncate the index and the data to remove both c and D. $ hg clone --quiet --rev 1 troffset-computation troffset-computation-copy $ cd troffset-computation-copy Reference size: $ f -s file file: size=1024 $ f -s .hg/store/data/file* .hg/store/data/file.i: size=1174 $ cat > .hg/hgrc <<EOF > [hooks] > pretxnchangegroup = python:$TESTTMP/killme.py:killme > EOF #if chg $ hg pull ../troffset-computation pulling from ../troffset-computation [255] #else $ hg pull ../troffset-computation pulling from ../troffset-computation Killed [137] #endif The revlog have been split on disk $ f -s .hg/store/data/file* .hg/store/data/file.d: size=132139 .hg/store/data/file.i: size=256 $ cat .hg/store/journal | tr -s '\000' ' ' | grep data/file | tail -1 data/file.i 128 The first file.i entry should match the "Reference size" above. The first file.d entry is the temporary record during the split, The second entry after the split happened. The sum of the second file.d and the second file.i entry should match the first file.i entry. $ cat .hg/store/journal | tr -s '\000' ' ' | grep data/file data/file.i 1174 data/file.d 0 data/file.d 1046 data/file.i 128 $ hg recover rolling back interrupted transaction (verify step skipped, run `hg verify` to check your repository content) $ f -s .hg/store/data/file* .hg/store/data/file.d: size=1046 .hg/store/data/file.i: size=128 $ hg tip changeset: 1:cfa8d6e60429 tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: b $ hg verify -q warning: revlog 'data/file.d' not in fncache! 1 warnings encountered! hint: run "hg debugrebuildfncache" to recover from corrupt fncache $ hg debugrebuildfncache --only-data adding data/file.d 1 items added, 0 removed from fncache $ hg verify -q $ cd .. Test a hard crash right before the index is move into place =========================================================== Now retry the procedure but intercept the rename of the index and check that the journal does not contain the new index size. This demonstrates the edge case where the data file is left as garbage. $ hg clone --quiet --rev 1 troffset-computation troffset-computation-copy2 $ cd troffset-computation-copy2 Reference size: $ f -s file file: size=1024 $ f -s .hg/store/data/file* .hg/store/data/file.i: size=1174 $ cat > .hg/hgrc <<EOF > [extensions] > intercept_rename = $TESTTMP/intercept_before_rename.py > [hooks] > pretxnchangegroup = python:$TESTTMP/killme.py:killme > EOF #if chg $ hg pull ../troffset-computation pulling from ../troffset-computation [255] #else $ hg pull ../troffset-computation pulling from ../troffset-computation Killed [137] #endif The data file is created, but the revlog is still inline $ f -s .hg/store/data/file* .hg/store/data/file.d: size=132139 .hg/store/data/file.i: size=132395 $ cat .hg/store/journal | tr -s '\000' ' ' | grep data/file data/file.i 1174 data/file.d 0 data/file.d 1046 $ hg recover rolling back interrupted transaction (verify step skipped, run `hg verify` to check your repository content) $ f -s .hg/store/data/file* .hg/store/data/file.d: size=1046 .hg/store/data/file.i: size=1174 $ hg tip changeset: 1:cfa8d6e60429 tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: b $ hg verify -q $ cd .. Have the transaction rollback itself without any hard crash =========================================================== Repeat the original test but let hg rollback the transaction. $ hg clone --quiet --rev 1 troffset-computation troffset-computation-copy-rb $ cd troffset-computation-copy-rb $ cat > .hg/hgrc <<EOF > [hooks] > pretxnchangegroup = false > EOF $ hg pull ../troffset-computation pulling from ../troffset-computation searching for changes adding changesets adding manifests adding file changes transaction abort! rollback completed abort: pretxnchangegroup hook exited with status 1 [40] File are still split on disk, with the expected size. $ f -s .hg/store/data/file* .hg/store/data/file.d: size=1046 .hg/store/data/file.i: size=128 $ hg tip changeset: 1:cfa8d6e60429 tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: b $ hg verify -q warning: revlog 'data/file.d' not in fncache! 1 warnings encountered! hint: run "hg debugrebuildfncache" to recover from corrupt fncache $ cd ..