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SubjectRe: How git affects kernel.org performance
Hi!

> > Would e2fsck -D help? What kind of optimization
> > does it perform?
>
> It will help a little; e2fsck -D compresses the logical view of the
> directory, but it doesn't optimize the physical layout on disk at all,
> and of course, it won't help with the lack of readahead logic. It's
> possible to improve how e2fsck -D works, at the moment, it's not
> trying to make the directory be contiguous on disk. What it should
> probably do is to pull a list of all of the blocks used by the
> directory, sort them, and then try to see if it can improve on the
> list by allocating some new blocks that would make the directory more
> contiguous on disk. I suspect any improvements that would be seen by
> doing this would be second order effects at most, though.

...sounds like a job for e2defrag, not e2fsck...
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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