[Bug 14914] files are created as sparse files when they shouldn't

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=14914





--- Comment #31 from Danila Sentiabov <dsent.zen at gmail.com>  2010-05-28 11:24:03 ---
This bug is hard to reproduce purposefully.
Its appearance depends on other users' activity on tracker, for example.
Most likely to see when there are many peers with low upload bandwidth so file
gets downloaded in small chunks over a long period of time while at the same
time other applications perform many writes on the same partition. On Windows
it happens too if preallocation is disabled.

I think I get your point abount NTFS bug. You think NTFS driver should do
preallocation like native Windows driver do. It makes sense, but I don't think
NTFS-3G developers will agree. They don't have a goal to mimic Windows behavior
- only read from and write to NTFS partitions in a non-destructive manner so
preallocation algorithm different than Windows' one will not be considered a
bug if the filesystem is consistent and accessible from Windows.

I also think it should happen on native Linux partitions - they suffer from
fragmentation too and heavily under some loads (like torrents here).

I'll try to come up with an idea of test to demonstrate the effect. However,
I'm personally not bothered with it and occasional performance problems are
easily solved with stopping uTorrent, moving the fragmented files to another
partition and back thus defragmenting them, then starting uTorrent again.

I suppose it's really a pain to debug and fix for a small profit.

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