E.Rodichev wrote:
This problem is addressed by file system (fsck, journalling etc.). Is it reasonable to handle it directly within application?
In the words of the Duke of Wellington, "If you believe that you'll believe anything."
Please review past discussions on the mailing lists on this point.
BTW, most journalling file systems do not guarantee file integrity, only file metadata integrity. In particular, I believe this is tru of NTFS (and whether it even does that has been debated).
So by all means turn off fsync if you want the performance gain *and* you accept the risk. But if you do, don't come crying later that your data has been lost or corrupted.
(the results are interesting, though - with fsync off Windows and Linux are in the same performance ballpark.)
cheers
andrew
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