[jira] [Commented] (FLINK-1901) Create sample operator for Dataset

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

    [ https://issues.apache.org/jira/browse/FLINK-1901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14654751#comment-14654751 ] 

ASF GitHub Bot commented on FLINK-1901:
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Github user ChengXiangLi commented on the pull request:

    https://github.com/apache/flink/pull/949#issuecomment-127835084
  
    Thanks for the review, Till. For your last suggestion, I'm aware of this issue before, but i didn't know the exist of RichMapPartitionFunction, thanks for reminding it, i would update the code soon.


> Create sample operator for Dataset
> ----------------------------------
>
>                 Key: FLINK-1901
>                 URL: https://issues.apache.org/jira/browse/FLINK-1901
>             Project: Flink
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Theodore Vasiloudis
>            Assignee: Chengxiang Li
>
> In order to be able to implement Stochastic Gradient Descent and a number of other machine learning algorithms we need to have a way to take a random sample from a Dataset.
> We need to be able to sample with or without replacement from the Dataset, choose the relative size of the sample, and set a seed for reproducibility.



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