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Posted to dev@hive.apache.org by "Karthik Ranganathan (JIRA)" <ji...@apache.org> on 2012/10/21 20:14:12 UTC

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

Karthik Ranganathan created HIVE-3603:
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             Summary: 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
            Priority: Minor


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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