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https://issues.apache.org/jira/browse/SPARK-10694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15030576#comment-15030576
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Dibyendu Bhattacharya commented on SPARK-10694:
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Hi [~andrewor14] . Can you please let me know if this PR makes sense .
> Prevent Data Loss in Spark Streaming when used with OFF_HEAP
> ExternalBlockStore (Tachyon)
> -----------------------------------------------------------------------------------------
>
> Key: SPARK-10694
> URL: https://issues.apache.org/jira/browse/SPARK-10694
> Project: Spark
> Issue Type: Bug
> Components: Block Manager, Streaming
> Affects Versions: 1.5.0
> Reporter: Dibyendu Bhattacharya
>
> If Streaming application stores the blocks OFF_HEAP, it may not need any WAL
> like feature to recover from Driver failure. As long as the writing of blocks
> to Tachyon from Streaming receiver is durable, it should be recoverable from
> Tachyon directly on Driver failure.
> This can solve the issue of expensive WAL write and duplicating the blocks
> both in MEMORY and also WAL and also guarantee end to end No-Data-Loss
> channel using OFF_HEAP store.
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