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* Fix concurrency issues in download-using-manifests' handling of the

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SQLite manifest cache.  The DBI AutoCommit feature caused every
  process to have an active transaction at all times, which could
  indefinitely block processes wanting to update the manifest cache.

* Disable fsync() in the manifest cache because we don't need
  integrity (the cache can always be recreated if it gets corrupted).
This commit is contained in:
Eelco Dolstra 2011-07-13 14:05:54 +00:00
parent 0a623a10c7
commit e649f3168b
2 changed files with 12 additions and 1 deletions
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6
scripts/download-using-manifests.pl.in
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@ -267,6 +267,12 @@ my @path = computeSmallestDownload $targetPath;
die "don't know how to produce $targetPath\n" if scalar @path == 0;
# We don't need the manifest anymore, so close it as an optimisation:
# if we still have SQLite locks blocking other processes (we
# shouldn't), this gets rid of them.
$dbh->disconnect;
# Traverse the shortest path, perform the actions described by the
# edges.
my $curStep = 1;