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Posted to dev@mahout.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2013/03/20 14:49:17 UTC
[jira] [Commented] (MAHOUT-1167) Parallel item similarity
precomputation on a single machine
[ https://issues.apache.org/jira/browse/MAHOUT-1167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13607616#comment-13607616 ]
Hudson commented on MAHOUT-1167:
--------------------------------
Integrated in Mahout-Quality #1912 (See [https://builds.apache.org/job/Mahout-Quality/1912/])
MAHOUT-1167 Parallel item similarity precomputation on a single machine (Revision 1458765)
Result = FAILURE
ssc : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1458765
Files :
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/similarity/item/ItemSimilarityJob.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/similarity/item/SimilarItem.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/similarity/precompute
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/similarity/precompute/FileSimilarItemsWriter.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/similarity/precompute/MultithreadedBatchItemSimilarities.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/similarity/precompute
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/similarity/precompute/BatchItemSimilarities.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/similarity/precompute/SimilarItem.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/similarity/precompute/SimilarItems.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/similarity/precompute/SimilarItemsWriter.java
* /mahout/trunk/examples/src/main/java/org/apache/mahout/cf/taste/similarity
* /mahout/trunk/examples/src/main/java/org/apache/mahout/cf/taste/similarity/precompute
* /mahout/trunk/examples/src/main/java/org/apache/mahout/cf/taste/similarity/precompute/example
* /mahout/trunk/examples/src/main/java/org/apache/mahout/cf/taste/similarity/precompute/example/BatchItemSimilaritiesGroupLens.java
> Parallel item similarity precomputation on a single machine
> -----------------------------------------------------------
>
> Key: MAHOUT-1167
> URL: https://issues.apache.org/jira/browse/MAHOUT-1167
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Affects Versions: 0.8
> Reporter: Sebastian Schelter
> Assignee: Sebastian Schelter
> Attachments: MAHOUT-1167.patch
>
>
> We need some code for item-based CF usecases with an intermediate data size (e.g., a few million interactions). In such cases, the data might be too big to allow online computation of similarities and recommendations, but at the same time, going to Hadoop might still not be necessary and desired.
> In such a case, it makes sense to precompute item similarities on a single machine.
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