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https://issues.apache.org/jira/browse/MAHOUT-1166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13604302#comment-13604302
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Hudson commented on MAHOUT-1166:
--------------------------------
Integrated in Mahout-Quality #1907 (See
[https://builds.apache.org/job/Mahout-Quality/1907/])
MAHOUT-1166 Multithreaded version of distributed ALS (Revision 1457240)
Result = SUCCESS
ssc : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1457240
Files :
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/ALS.java
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/ALSUtils.java
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/FactorizationEvaluator.java
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/MultithreadedSharingMapper.java
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/ParallelALSFactorizationJob.java
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/RecommenderJob.java
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/SharingMapper.java
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/SharingSolveExplicitFeedbackMapper.java
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/SharingSolveImplicitFeedbackMapper.java
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/SolveExplicitFeedbackMapper.java
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/SolveImplicitFeedbackMapper.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/common/AbstractJob.java
*
/mahout/trunk/core/src/test/java/org/apache/mahout/cf/taste/hadoop/als/ParallelALSFactorizationJobTest.java
* /mahout/trunk/examples/bin/factorize-movielens-1M.sh
* /mahout/trunk/examples/bin/factorize-netflix.sh
*
/mahout/trunk/math/src/main/java/org/apache/mahout/math/als/AlternatingLeastSquaresSolver.java
> Multithreaded version of distributed ALS
> ----------------------------------------
>
> Key: MAHOUT-1166
> URL: https://issues.apache.org/jira/browse/MAHOUT-1166
> Project: Mahout
> Issue Type: Improvement
> Components: Collaborative Filtering
> Reporter: Sebastian Schelter
> Assignee: Sebastian Schelter
> Attachments: MAHOUT-1166.patch
>
>
> Our implementation of ALS broadcasts the feature matrices in each iteration.
> Therefore, it makes sense to run the mappers in multithreaded mode to not
> have to load one copy of the feature matrix per core, but share the read-only
> in-memory copy.
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