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https://issues.apache.org/jira/browse/HBASE-3726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary Helmling resolved HBASE-3726.
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Resolution: Duplicate
Closing as a duplicate of HBASE-10169
> 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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