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From Randall McRee <>
Subject Question on Random number generators
Date Tue, 26 Apr 2011 19:03:49 GMT
Hi folks,
I have been implementing an LSH-based knn scheme which could be donated to
Mahout. LSH, obviously, needs good random generators. The problem is that
existing code in Mahout seems to favor java.util.Random which is widely
known to be sub-optimal. At the very least it does not keep up with
state-of-the-art like MersenneTwister and Well. So, Mahout also has
RandomEngine which is fine as an interface but does also does not contain
implementations of, for example, the new WELL generators.

Apache's common-math project seems to have all of these generators,
including WELL variants, but under yet another interface, RandomGenerator.

So, the question to the list is: would it be acceptable to contribute code
which makes use of org.apache.commons.math.random.RandomGenerator rather
than Mahout's built-in

Randy McRee

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