[jira] [Updated] (HBASE-3726) Allow coprocessor callback RPC calls to be batched at region server level

["Andrew Purtell (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-3726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell updated HBASE-3726:
----------------------------------

    Issue Type: Improvement  (was: Sub-task)
        Parent:     (was: HBASE-2000)

> Allow coprocessor callback RPC calls to be batched at region server level
> -------------------------------------------------------------------------
>
>                 Key: HBASE-3726
>                 URL: https://issues.apache.org/jira/browse/HBASE-3726
>             Project: HBase
>          Issue Type: Improvement
>          Components: coprocessors
>            Reporter: Ted Yu
>
> Cuurently the Callback.update() method is called for each Call.call() return value obtained from each region.  Each Call.call() invocation is a separate RPC, so there is currently one RPC per region. So there's no place at the moment for the region server to be involved in any aggregation across regions.
> There is some preliminary support in HConnectionManager.HConnectionImplementation.processBatch() that would allow doing 1 RPC per region server, same as we do for multi-get and multi-put.
> We should provide ability to batch callback RPC calls.

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