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https://issues.apache.org/jira/browse/HIVE-17545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16179533#comment-16179533
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Sahil Takiar commented on HIVE-17545:
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I think the advantages here are (1) if there are any bugs in the RDD caching
logic (right now it may be simple, but in the future the logic to cache things
may be configurable), or (2) there may be scenarios where users don't want to
cache the data - maybe they don't have much disk space available and would
rather recompute the RDD vs storing it.
> Make HoS RDD Cacheing Optimization Configurable
> -----------------------------------------------
>
> Key: HIVE-17545
> URL: https://issues.apache.org/jira/browse/HIVE-17545
> Project: Hive
> Issue Type: Improvement
> Components: Physical Optimizer, Spark
> Reporter: Sahil Takiar
> Assignee: Sahil Takiar
> Attachments: HIVE-17545.1.patch, HIVE-17545.2.patch
>
>
> The RDD cacheing optimization add in HIVE-10550 is enabled by default. We
> should make it configurable in case users want to disable it. We can leave it
> on by default to preserve backwards compatibility.
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