hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9736) StorageBasedAuthProvider should batch namenode-calls where possible.
Date Wed, 29 Apr 2015 04:18:05 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14518695#comment-14518695
] 

Chris Nauroth commented on HIVE-9736:
-------------------------------------

Hi [~mithun].  Thank you for uploading a new patch.

I was unable to apply patch v3 to the master branch.  Does it need to be rebased, or should
I be working with a different branch?

There was one suggestion I made on Review Board that still isn't implemented.  In {{Hadoop23Shims#checkFileAccess}},
we can combine the multiple {{actions}} by using {{FsAction#or}}, and then call {{accessMethod.invoke}}
just once to do the check in a single RPC (per file).  Were you planning to make this change,
or is there a reason you decided not to do it?

Aside from that, I can see all of my other feedback has been addressed.  Thanks again!

> 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
>
>
> 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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message