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https://issues.apache.org/jira/browse/SPARK-6479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14393590#comment-14393590
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Zhan Zhang edited comment on SPARK-6479 at 4/2/15 10:23 PM:
------------------------------------------------------------
[~rxin] Thanks for the feedback. I updated the document with the basic design
and example on handling failure case thrown by underlying implementation.
Basically, the shim layer handles all the exceptions/failure cases and return
expected failure value to upper layer, similar to below example.
override def getBytes(blockId: BlockId): Option[ByteBuffer] = {
try {
offHeapManager.flatMap(_.getBytes(blockId))
} catch {
case _ =>logError(s"error in getBytes from $blockId")
None
}
}
was (Author: zzhan):
[~rxin] Thanks for the feedback. I updated the document with the basic design
and example on handling failure case thrown by underlying implementation.
Basically, the shim layer handles all the exceptions/failure cases and return
expected failure value to upper layer, similar to below example.
override def getBytes(blockId: BlockId): Option[ByteBuffer] = {
try {
offHeapManager.flatMap(_.getBytes(blockId))
} catch {
case _ =>logError(s"error in getBytes from $blockId")
None
}
}
> Create off-heap block storage API (internal)
> --------------------------------------------
>
> Key: SPARK-6479
> URL: https://issues.apache.org/jira/browse/SPARK-6479
> Project: Spark
> Issue Type: Improvement
> Components: Block Manager, Spark Core
> Reporter: Reynold Xin
> Attachments: SPARK-6479.pdf, SPARK-6479OffheapAPIdesign.pdf,
> SparkOffheapsupportbyHDFS.pdf
>
>
> Would be great to create APIs for off-heap block stores, rather than doing a
> bunch of if statements everywhere.
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