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DragonFly bugs List (threaded) for 2005-02
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Re: Off-Topic Question


From: Joerg Sonnenberger <joerg@xxxxxxxxxxxxxxxxx>
Date: Thu, 17 Feb 2005 21:36:45 +0100
Mail-followup-to: bugs@crater.dragonflybsd.org

On Thu, Feb 17, 2005 at 11:03:54AM -0800, Matthew Dillon wrote:
>     FFS also has a serious issue with the way it lays out directories.
>     In particular, it cannot handle large directories efficiently.  The
>     dirhash code works up to a point but is a pretty nasty hack to try to
>     get around this limitation.

There was some discussion about that on the NetBSD lists including
possible ways to improve this. The basic problem is that adding a
file to a directory can result in a O(n) operation with n being the
size of the directory.

Joerg



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