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Subversion & FAT failures

From: Erik Huelsmann <e.huelsmann_at_gmx.net>
Date: 2005-06-25 23:19:04 CEST

Several weeks ago I asked CarlFK on IRC (#svn) to set up Win32 breakage
tests on several other Windows flavors than the one sussman's system is
running (W2k to be exact).

He set up a machine testing on NTFS, which has been running its tests just
fine, after initial startup problems. The other system (V400) has been
running tests on FAT. This system has been failing the testsuite from the
beginning and we haven't been able to fix it since. After a lot of fiddling
with the system, I decided to verify testing on FAT with sussman's system.

After switching sussman's testsystem to FAT, it started failing lots of
tests. From the logs, I conclude that status incorrectly reports files as
unchanged. Checking manually with TSVN, I see the same. 'touch'-ing the file
turns it into a 'changed' status.

What we have here is the problem that FAT has a 2 second timestamp
resolution, whereas we only 'sleep-for-timestamps' for 1 second.

Conclusion: We're currently broken for use on FAT.

Question: What to do about it?

Several possible answers:
- Don't support FAT
- Sleep an extra second for timestamps on Windows
- Set timestamps to the last second which has already passed instead of the
current one
- (more?)



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Received on Sat Jun 25 23:19:45 2005

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