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From "Szymon Chojnacki (JIRA)" <>
Subject [jira] Commented: (MAHOUT-588) Benchmark Mahout's clustering performance on EC2 and publish the results
Date Mon, 07 Feb 2011 14:47:31 GMT


Szymon Chojnacki commented on MAHOUT-588:

Thank you Ted for your support,
the vectors in our 3-gram set have 935 173 coordinates, on average 372 452 are non-empty (39.8%).
Currently we limited the dimensionality to around 500K by preserving only 1- and 2-grams.
When we are successful with the smaller dimensionality we come back to the issue of hashed
feature encoding with 3-grams.

> Benchmark Mahout's clustering performance on EC2 and publish the results
> ------------------------------------------------------------------------
>                 Key: MAHOUT-588
>                 URL:
>             Project: Mahout
>          Issue Type: Task
>            Reporter: Grant Ingersoll
>         Attachments:,,,,,,,,,,,, Top1000Tokens_maybe_stopWords,, clusters1.txt,
clusters_kMeans.txt, distcp_large_to_s3_failed.log, ec2_setup_notes.txt, seq2sparse_small_failed.log,
> For Taming Text, I've commissioned some benchmarking work on Mahout's clustering algorithms.
 I've asked the two doing the project to do all the work in the open here.  The goal is to
use a publicly reusable dataset (for now, the ASF mail archives, assuming it is big enough)
and run on EC2 and make all resources available so others can reproduce/improve.
> I'd like to add the setup code to utils (although it could possibly be done as a Vectorizer)
and the publication of the results will be put up on the Wiki as well as in the book.  This
issue is to track the patches, etc.

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