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Posted to dev@hbase.apache.org by "Andrew Purtell (JIRA)" <ji...@apache.org> on 2009/11/21 20:48:39 UTC

[jira] Created: (HBASE-2002) Coprocessors: Client side support

Coprocessors: Client side support
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                 Key: HBASE-2002
                 URL: https://issues.apache.org/jira/browse/HBASE-2002
             Project: Hadoop HBase
          Issue Type: Sub-task
            Reporter: Andrew Purtell


"High-level call interface for clients. Unlike RPC, calls addressed to rows or ranges of rows. Coprocessor client library resolves to actual locations. Calls across multiple rows automatically split into multiple parallelized RPCs"

Generic multicall RPC facility which incorporates this and multiget/multiput/multidelete and parallel scanners.

Group and batch RPCs by region server. Track and retry outstanding RPCs. Ride over region relocations. 

Support addressing by explicit region identifier or by row key or row key range. 

Include a facility for merging results client side. 





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