mahout-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ted Dunning <>
Subject Re: Taste-GenericItemBasedRecommender
Date Thu, 03 Dec 2009 20:28:55 GMT
I think you can merge my passes into a single pass in which you compute the
row and column sums at the same time that you compute the product.  That is
more complicated, though, and I hate fancy code.  So you are right in
practice that I have always had two passes.  (although pig might be clever
enough by now to merge them)

There is another pass in which you use all of the sums to do the
sparsification.  I don't know if that could be done in the same pass or not.

On Thu, Dec 3, 2009 at 10:55 AM, Jake Mannix <> wrote:

> But yeah, in the case at hand, maybe that transposition is a bunch of work.
> But is it more work to do my two MR jobs than to do your two MR jobs?  Both
> look
> like two full passes over the data, right?

Ted Dunning, CTO

  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message