Re: [reiserfs-dev] Re: Ext2 directory index: ALS paper and benchmarks

From: Jeremy Fitzhardinge (
Date: Sat Dec 08 2001 - 13:02:02 EST

On Fri, 2001-12-07 at 07:51, Daniel Phillips wrote:
> I did try R5 in htree, and at least a dozen other hashes. R5 was the worst
> of the bunch, in terms of uniformity of distribution, and caused a measurable
> slowdown in Htree performance. (Not an order of magnitude, mind you,
> something closer to 15%.)

Did you try the ReiserFS teahash? I wrote it specifically to address
the issue you mentioned in the paper of an attacker deliberately
generating collisions; the intention was that each directory (or maybe
filesystem) have its own distinct hashing key.


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This archive was generated by hypermail 2b29 : Sat Dec 15 2001 - 21:00:13 EST