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https://issues.apache.org/jira/browse/HIVE-9736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14527348#comment-14527348
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Chris Nauroth commented on HIVE-9736:
-------------------------------------
I figured we could make {{DefaultFileAccess#combine}} public, and then
{{Hadoop23Shims}} could call it. hive-shims-0.23 already has a dependency on
hive-shims-common. However, if there is a detail that I'm missing, then I
wouldn't intend to hold up the patch over making that change.
+1 (non-binding) from me, and I defer to you on what's best to do with
{{combine}} right now. Thank you for the patch, and thank you for responding
to the code review feedback!
> StorageBasedAuthProvider should batch namenode-calls where possible.
> --------------------------------------------------------------------
>
> Key: HIVE-9736
> URL: https://issues.apache.org/jira/browse/HIVE-9736
> Project: Hive
> Issue Type: Bug
> Components: Metastore, Security
> Reporter: Mithun Radhakrishnan
> Assignee: Mithun Radhakrishnan
> Attachments: HIVE-9736.1.patch, HIVE-9736.2.patch, HIVE-9736.3.patch,
> HIVE-9736.4.patch, HIVE-9736.5.patch
>
>
> Consider a table partitioned by 2 keys (dt, region). Say a dt partition could
> have 10000 associated regions. Consider that the user does:
> {code:sql}
> ALTER TABLE my_table DROP PARTITION (dt='20150101');
> {code}
> As things stand now, {{StorageBasedAuthProvider}} will make individual
> {{DistributedFileSystem.listStatus()}} calls for each partition-directory,
> and authorize each one separately. It'd be faster to batch the calls, and
> examine multiple FileStatus objects at once.
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