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Ts'o: Delayed allocation and the zero-length file problemTs'o: Delayed allocation and the zero-length file problemPosted Mar 13, 2009 20:17 UTC (Fri) by alexl (subscriber, #19068)In reply to: Ts'o: Delayed allocation and the zero-length file problem by endecotp Parent article: Ts'o: Delayed allocation and the zero-length file problem
I don't think that is quite necessary for durability.
If the metadata is not written out but the data is and then things crash, you will just have the old file as it was, and either a written file+inode with no name (moved to lost+found) or the written file with the temporary name.
As far as i can see syncing the directory is not needed. (Unless you want to guarantee the file being on disk, rather than just not breaking the atomic file replace behaviour.)
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