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https://issues.apache.org/jira/browse/HIVE-1806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12974713#action_12974713
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Namit Jain commented on HIVE-1806:
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Mostly looks good - a minor comment.
In the new test that you added, the merge job is a map-only job although you
are using HiveInputFormat
This is because of the fact that you are using hadoop 20 which supports
CombineHiveIF.
Do you think that is the correct behavior ? Looks OK, just wanted to confirm.
> The merge criteria on dynamic partitons should be per partiton
> --------------------------------------------------------------
>
> Key: HIVE-1806
> URL: https://issues.apache.org/jira/browse/HIVE-1806
> Project: Hive
> Issue Type: Bug
> Reporter: Ning Zhang
> Assignee: Ning Zhang
> Attachments: HIVE-1806.2.patch, HIVE-1806.3.patch, HIVE-1806.4.patch,
> HIVE-1806.patch
>
>
> Currently the criteria of whether a merge job should be fired on dynamic
> generated partitions are is the average file size of files across all dynamic
> partitions. It is very common that some dynamic partitions contains mostly
> large files and some contains mostly small files. Even though the average
> size of the total files are larger than the hive.merge.smallfiles.avgsize, we
> should merge those partitions containing small files only.
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