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From "Phabricator (JIRA)" <>
Subject [jira] [Commented] (HIVE-3603) Enable client-side caching for scans on HBase
Date Tue, 15 Jan 2013 13:42:15 GMT


Phabricator commented on HIVE-3603:

navis has commented on the revision "HIVE-3603 [jira] Enable client-side caching for scans
on HBase".

  hbase-handler/src/test/queries/positive/hbase_scan_params.q:7 It makes MR task and I don't
want add more test time. Furthermore, hbase returns rows always in deterministic way(ordered
by row key)


To: JIRA, navis
Cc: zhenxiao

> Enable client-side caching for scans on HBase
> ---------------------------------------------
>                 Key: HIVE-3603
>                 URL:
>             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 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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