[jira] [Commented] (MAHOUT-1786) Make classes implements Serializable for Spark 1.5+

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAHOUT-1786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15478973#comment-15478973 ] 

ASF GitHub Bot commented on MAHOUT-1786:
----------------------------------------

Github user andrewmusselman commented on the issue:

    https://github.com/apache/mahout/pull/174
  
    I see this is old; @michellemay could you let us know if there's any room to progress?


> Make classes implements Serializable for Spark 1.5+
> ---------------------------------------------------
>
>                 Key: MAHOUT-1786
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1786
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Math
>    Affects Versions: 0.11.0
>            Reporter: Michel Lemay
>            Priority: Minor
>              Labels: performance
>
> Spark 1.5 comes with a new very efficient serializer that uses code generation.  It is twice as fast as kryo.  When using mahout, we have to set KryoSerializer because some classes aren't serializable otherwise.  
> I suggest to declare Math classes as "implements Serializable" where needed.  For instance, to use coocurence package in spark 1.5, we had to modify AbstractMatrix, AbstractVector, DenseVector and SparseRowMatrix to make it work without Kryo.



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