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Date: Thu, 22 Feb 2001 00:07:55 +0100
From: Martin Mares <mj@suse.cz>
To: "H. Peter Anvin" <hpa@transmeta.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [rfc] Near-constant time directory index for Ext2
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Hello!

> True.  Note too, though, that on a filesystem (which we are, after all,
> talking about), if you assume a large linear space you have to create a
> file, which means you need to multiply the cost of all random-access
> operations with O(log n).

One could avoid this, but it would mean designing the whole filesystem in a
completely different way -- merge all directories to a single gigantic
hash table and use (directory ID,file name) as a key, but we were originally
talking about extending ext2, so such massive changes are out of question
and your log n access argument is right.

				Have a nice fortnight
-- 
Martin `MJ' Mares <mj@ucw.cz> <mj@suse.cz> http://atrey.karlin.mff.cuni.cz/~mj/
COBOL -- Completely Outdated, Badly Overused Language
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