Messages in this thread | | | Date | Thu, 19 Jun 2008 11:56:45 -0400 | From | Theodore Tso <> | Subject | Re: Performance of ext4 |
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On Tue, Jun 17, 2008 at 11:42:36AM +0000, Holger Kiehl wrote: > Note how the size of file results.24033.helena.dwd.de changes from > 9230 before the test to 8208 bytes after the test. Also note the > date both have the same timestamp "2008-06-17 04:35". I have made a > copy of results.24033.helena.dwd.de before the test and compared it > with that after the test. The file is just truncated by 1022 bytes > and there is no garbage.
So the corruption is always a truncation, correct?
Did you notice the problem with ext4 w/o the patch queue? I have a suspicion that the problem may have been introduced by the delayed allocation code, but I don't have hard evidence. When you rerun your benchmark (which seems to be the closest thing we have to a reproduction case), it would be interesting to know if the problem goes away with -o nodelalloc (again, it would localize where we need to look).
Thanks, regards,
- Ted
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