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https://issues.apache.org/jira/browse/HIVE-17545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16185099#comment-16185099
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Sahil Takiar commented on HIVE-17545:
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[~lirui] thanks for the input. I'm going to close this as Won't Fix then. Given
your description of {{SplitSparkWorkResolver}} it sounds like enabling
{{CombineEquivalentWorkResolver}} is the only time we can have multiple
children. Since we have a config for {{CombineEquivalentWorkResolver}}, adding
an extra config doesn't seem necessary.
It looks like the RDD cacheing for parallel order by is also configurable, so
we should be favored there too.
Thanks for all the help on this everyone!
> 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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