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Posted to dev@hive.apache.org by "Navis (JIRA)" <ji...@apache.org> on 2013/01/04 03:12:14 UTC

[jira] [Updated] (HIVE-3603) Enable client-side caching for scans on HBase

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

Navis updated HIVE-3603:
------------------------

    Assignee: Navis
      Status: Patch Available  (was: Open)
    
> 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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