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https://issues.apache.org/jira/browse/SPARK-11731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15004356#comment-15004356
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Apache Spark commented on SPARK-11731:
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User 'brkyvz' has created a pull request for this issue:
https://github.com/apache/spark/pull/9695

> Enable batching on Driver WriteAheadLog by default
> --------------------------------------------------
>
>                 Key: SPARK-11731
>                 URL: https://issues.apache.org/jira/browse/SPARK-11731
>             Project: Spark
>          Issue Type: Improvement
>          Components: Streaming
>            Reporter: Burak Yavuz
>
> Using batching on the driver for the WriteAheadLog should be an improvement 
> for all environments and use cases. Users will be able to scale to much 
> higher number of receivers with the BatchedWriteAheadLog. Therefore we should 
> turn it on by default, and QA it in the QA period.



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