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From "Sushanth Sowmyan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-6584) Add HiveHBaseTableSnapshotInputFormat
Date Mon, 28 Jul 2014 20:13:38 GMT

    [ https://issues.apache.org/jira/browse/HIVE-6584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14076742#comment-14076742
] 

Sushanth Sowmyan commented on HIVE-6584:
----------------------------------------

+1 on the patch.

The one thing I'd change before committing is a word-wrap for the ASF header in conf/hive-default.xml.template,
to retain old newline behaviour there. But otherwise, looks good to me. 

We'll need to update those TODOs in a bit once we upgrade to a newer version of HBase (0.98.5+)
to pick up HBASE-11555. I would have suggested doing that in this patch itself, given that
you're already bumping version up to 0.98.3, except that I see that that got resolved only
recently, and I don't want to drag this patch out any further. Could you please open another
jira to track that TODO?

> Add HiveHBaseTableSnapshotInputFormat
> -------------------------------------
>
>                 Key: HIVE-6584
>                 URL: https://issues.apache.org/jira/browse/HIVE-6584
>             Project: Hive
>          Issue Type: Improvement
>          Components: HBase Handler
>            Reporter: Nick Dimiduk
>            Assignee: Nick Dimiduk
>             Fix For: 0.14.0
>
>         Attachments: HIVE-6584.0.patch, HIVE-6584.1.patch, HIVE-6584.10.patch, HIVE-6584.11.patch,
HIVE-6584.12.patch, HIVE-6584.2.patch, HIVE-6584.3.patch, HIVE-6584.4.patch, HIVE-6584.5.patch,
HIVE-6584.6.patch, HIVE-6584.7.patch, HIVE-6584.8.patch, HIVE-6584.9.patch
>
>
> HBASE-8369 provided mapreduce support for reading from HBase table snapsopts. This allows
a MR job to consume a stable, read-only view of an HBase table directly off of HDFS. Bypassing
the online region server API provides a nice performance boost for the full scan. HBASE-10642
is backporting that feature to 0.94/0.96 and also adding a {{mapred}} implementation. Once
that's available, we should add an input format. A follow-on patch could work out how to integrate
this functionality into the StorageHandler, similar to how HIVE-6473 integrates the HFileOutputFormat
into existing table definitions.



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