Author: Theodore Ts'o <firstname.lastname@example.org>
Date: Fri Apr 3 01:34:49 2009 -0400
ext3: Add replace-on-rename hueristics for data=writeback mode
In data=writeback mode, start an asynchronous flush when renaming a
file on top of an already-existing file. This lowers the probability
of data loss in the case of applications that attempt to replace a
file via using rename().
If you aren't sure, I recommend using ext3 with the explicit data=ordered option until you've had the opportunity to sit down and understand the data=writeback and/or ext4 semantics.
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