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From Jeff Eastman <>
Subject Fwd: [jira] Commented: (MAHOUT-294) Uniform API behavior for Jobs
Date Tue, 14 Sep 2010 22:45:06 GMT
  Posting this to users@ so folks will be aware of the new SVD arguments 
and also the change in SVD --output semantics. The wiki has also been 
updated at


-------- Original Message --------
Subject: 	[jira] Commented: (MAHOUT-294) Uniform API behavior for Jobs
Date: 	Tue, 14 Sep 2010 14:51:34 -0400 (EDT)
From: 	Hudson (JIRA) <>


Hudson commented on MAHOUT-294:

Integrated in Mahout-Quality #276 (See [])
     MAHOUT-294: Added arguments to the DistributedLanczosSolver CLI so that
it can optionally launch the EigenVerificationJob. Added a new run() method with
additional arguments needed by EVJ. Added new unit tests of the CLI and adjusted
some of the cluster dumper tests to use the new run method. All tests run.

NOTE: this patch changes the semantics of the DLS --output argument: Formerly
it was the path to the output (raw) eigenvectors file. Now it is a path to an output
directory in which a rawEigenvectors file will be written. If the EVJ is also specified,
then the output directory will contain a cleanEigenvectors file in addition.

>  Uniform API behavior for Jobs
>  -----------------------------
>                  Key: MAHOUT-294
>                  URL:
>              Project: Mahout
>           Issue Type: Improvement
>           Components: Classification, Clustering, Collaborative Filtering, Frequent Itemset/Association
Rule Mining, Genetic Algorithms, Math, Utils
>     Affects Versions: 0.4
>             Reporter: Robin Anil
>              Fix For: 0.4
>          Attachments: MAHOUT-294.patch, MAHOUT-294.patch, MAHOUT-294a.patch
>  * Move AbstractJob to common and convert all the Driver classes to extend that.
>     One suggestion is:
>     AlgorithmParams params ="-i", input).withParam("-o",
>     MyAlgorithmn.runJob(params) throws ParameterMissingException;
>  * Give uniform command-line parameters for various algorithms.
>     e.g Currently distance measure is -d, -dm, -m at different places in clustering
>  * Add a temp directory as a parameter
>  This issue will keep track of all discussion/patches related to the design and cleanup
of Mahout API

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