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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/2887/
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Review request for mahout.
Summary
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RecommenderJob now supports an option called "broadcast" that determines
whether the recommendations shall be computed with a reduce-side join (the
current approach) or a broadcast join (new and faster approach, that is
applicable as long as the similarity matrix fits into the memory of a mapper
instance)
This addresses bug MAHOUT-827.
https://issues.apache.org/jira/browse/MAHOUT-827
Diffs
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trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/TasteHadoopUtils.java
1204135
trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/item/AggregateAndRecommendReducer.java
1204135
trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/item/ItemIDIndexReducer.java
1204135
trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/item/PartialMultiplyMapper.java
1204135
trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/item/RecommenderJob.java
1204135
trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/item/UserVectorSplitterMapper.java
1204135
trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/item/broadcast/Estimators.java
PRE-CREATION
trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/item/broadcast/RecommendationsPerUserMapper.java
PRE-CREATION
trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/item/broadcast/SimilarityMatrixIterator.java
PRE-CREATION
trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/preparation/PreparePreferenceMatrixJob.java
1204135
trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/similarity/GenericItemSimilarity.java
1204135
trunk/core/src/main/java/org/apache/mahout/common/AbstractJob.java 1204135
trunk/core/src/main/java/org/apache/mahout/common/iterator/sequencefile/SequenceFileDirIterator.java
1204135
trunk/core/src/main/java/org/apache/mahout/math/hadoop/similarity/cooccurrence/RowSimilarityJob.java
1204135
trunk/core/src/test/java/org/apache/mahout/cf/taste/hadoop/item/RecommenderJobTest.java
1204135
trunk/core/src/test/java/org/apache/mahout/cf/taste/hadoop/item/broadcast/SimilarityMatrixIteratorTest.java
PRE-CREATION
trunk/core/src/test/java/org/apache/mahout/math/hadoop/MathHelper.java
1204135
Diff: https://reviews.apache.org/r/2887/diff
Testing
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Thanks,
Sebastian
