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From "Phabricator (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-3603) Enable client-side caching for scans on HBase
Date Fri, 04 Jan 2013 02:12:15 GMT

     [ https://issues.apache.org/jira/browse/HIVE-3603?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phabricator updated HIVE-3603:
------------------------------

    Attachment: HIVE-3603.D7761.1.patch

navis requested code review of "HIVE-3603 [jira] Enable client-side caching for scans on HBase".
Reviewers: JIRA

  DPAL-1955 Enable client-side caching for scans on HBase

  HBaseHandler sets up a TableInputFormat MR job against HBase to read data in. The underlying
implementation (in HBaseHandler.java) makes an RPC call per row-key, which makes it very inefficient.
Need to specify a client side cache size on the scan.

  Note that HBase currently only supports num-rows based caching (no way to specify a memory
limit). Created HBASE-6770 to address this.

TEST PLAN
  EMPTY

REVISION DETAIL
  https://reviews.facebook.net/D7761

AFFECTED FILES
  hbase-handler/src/java/org/apache/hadoop/hive/hbase/HBaseSerDe.java
  hbase-handler/src/java/org/apache/hadoop/hive/hbase/HBaseStorageHandler.java
  hbase-handler/src/java/org/apache/hadoop/hive/hbase/HiveHBaseTableInputFormat.java
  hbase-handler/src/test/queries/positive/hbase_scan_params.q
  hbase-handler/src/test/results/positive/hbase_scan_params.q.out

MANAGE HERALD DIFFERENTIAL RULES
  https://reviews.facebook.net/herald/view/differential/

WHY DID I GET THIS EMAIL?
  https://reviews.facebook.net/herald/transcript/18699/

To: JIRA, navis

                
> Enable client-side caching for scans on HBase
> ---------------------------------------------
>
>                 Key: HIVE-3603
>                 URL: https://issues.apache.org/jira/browse/HIVE-3603
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Karthik Ranganathan
>            Assignee: Navis
>            Priority: Minor
>         Attachments: HIVE-3603.D7761.1.patch
>
>
> HBaseHandler sets up a TableInputFormat MR job against HBase to read data in. The underlying
implementation (in HBaseHandler.java) makes an RPC call per row-key, which makes it very inefficient.
Need to specify a client side cache size on the scan.
> Note that HBase currently only supports num-rows based caching (no way to specify a memory
limit). Created HBASE-6770 to address this.

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