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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/02/24 22:12:05 UTC

[jira] [Commented] (SPARK-5976) Factors returned by ALS do not have partitioners associated.

    [ https://issues.apache.org/jira/browse/SPARK-5976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14335464#comment-14335464 ] 

Apache Spark commented on SPARK-5976:
-------------------------------------

User 'mengxr' has created a pull request for this issue:
https://github.com/apache/spark/pull/4748

> Factors returned by ALS do not have partitioners associated.
> ------------------------------------------------------------
>
>                 Key: SPARK-5976
>                 URL: https://issues.apache.org/jira/browse/SPARK-5976
>             Project: Spark
>          Issue Type: Bug
>          Components: ML, MLlib
>    Affects Versions: 1.3.0
>            Reporter: Xiangrui Meng
>            Assignee: Xiangrui Meng
>            Priority: Critical
>
> The model trained by ALS requires partitioning information to do quick lookup of a user/item factor for making recommendation on individual requests. In the new implementation, we don't put partitioners with ALS, which would cause performance regression.



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