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https://issues.apache.org/jira/browse/BEAM-918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15664251#comment-15664251
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Jean-Baptiste Onofré commented on BEAM-918:
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Waiting for merge of https://github.com/apache/incubator-beam/pull/1291 as it
will be easier to apply.
> Let users set STORAGE_LEVEL via SparkPipelineOptions.
> -----------------------------------------------------
>
> Key: BEAM-918
> URL: https://issues.apache.org/jira/browse/BEAM-918
> Project: Beam
> Issue Type: Improvement
> Components: runner-spark
> Reporter: Amit Sela
> Assignee: Jean-Baptiste Onofré
>
> Spark provides different "STORAGE_LEVEL"s for caching RDDs (disk, memory,
> ser/de, etc.).
> The runner decides on caching when necessary, for example when a RDD is
> accessed repeatedly.
>
> For batch, we can let users set their preferred STORAGE_LEVEL via
> SparkPipelineOptions.
> Note: for streaming we force a "MEMORY_ONLY", since (among other things) the
> runner heavily relies on stateful operations, and it's natural for streaming
> to happen in memory.
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