On Thu, Nov 03, 2005 at 12:36:29AM +0100, Jan Kasprzak wrote:
> ...
> Yes, of course. However, the issue is probably much worse
> on XFS, because on XFS it probably affects not only the files being
> created/extended, but also the files being rewritten. Most other
No, thats not correct - XFS behaves as most filesystems do and
will write over the top of existing data.
> filesystems rewrite the files in-place, so when you rewrite the file,
> even with data=writeback you get only the mix of the old and new
> contents. Not somebody else's random data.
XFS also rewrites files in-place. You will never get someone else's
current data (that would be metadata corruption...), it would only
ever be uninitialised, previously-free space. But as I said, other
filesystems have the same window in which this can happen (in the
absence of stronger data ordering/journalling semantics, of course).
cheers.
--
Nathan
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