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https://issues.apache.org/jira/browse/HIVE-22045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16896393#comment-16896393
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Vineet Garg commented on HIVE-22045:
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bq. Is that going to be another perf regression?
I suppose not. Due to {{isBlobStorage}} LOAD data regressed significantly but
it helped CTAS/CM statements, now with this patch behavior for CTAS/CM should
be same as with {{isBlobStorage}}.
bq. The FileSinkDesc:isCTas* method needs more docs in the declaration.
Upload patch which should address this.
> HIVE-21711 introduced regression in data load
> ---------------------------------------------
>
> Key: HIVE-22045
> URL: https://issues.apache.org/jira/browse/HIVE-22045
> Project: Hive
> Issue Type: Bug
> Affects Versions: 4.0.0
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
> Attachments: HIVE-22045.1.patch, HIVE-22045.2.patch,
> HIVE-22045.3.patch, HIVE-22045.4.patch
>
>
> Better fix for HIVE-21711 is to specialize the handling for CTAS/Create MV
> statements to avoid intermittent rename operation but keep INSERT etc
> statements do intermittent rename since otherwise final move by file
> operation is significantly slow for such statements.
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