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https://issues.apache.org/jira/browse/SPARK-4844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14247652#comment-14247652
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Guoqiang Li commented on SPARK-4844:
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Sorry, I mean, all of the data need to be serialized in {{RDD.sample}}, it is
very inefficient.
> SGD should support custom sampling.
> -----------------------------------
>
> Key: SPARK-4844
> URL: https://issues.apache.org/jira/browse/SPARK-4844
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Reporter: Guoqiang Li
> Fix For: 1.3.0
>
>
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