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https://issues.apache.org/jira/browse/HIVE-17545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16180288#comment-16180288
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liyunzhang_intel commented on HIVE-17545:
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[~lirui]: thanks for explanation. If disabled cache, even equivalent works are
combined, the computation for the same work are still executed.
> 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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