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https://issues.apache.org/jira/browse/DRILL-48?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13601285#comment-13601285
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Ted Dunning commented on DRILL-48:
----------------------------------

There has been quite a bit of discussion on the mailing list on this topic as 
well.

My own preference any more is to use Protobufs.  The protobuf-rpc-pro makes 
bidirectional RPC's very simple.  I have found it much easier to get started 
with protobufs than Avro in the past largely due to enormously better 
documentation for proto-bufs.


                
> RPC interface for query submission and physical plan execution
> --------------------------------------------------------------
>
>                 Key: DRILL-48
>                 URL: https://issues.apache.org/jira/browse/DRILL-48
>             Project: Apache Drill
>          Issue Type: Task
>            Reporter: David Alves
>
> Now that drill has a minimal set of functions that allow to actually execute 
> something we should come up with the RPC interface that will sit in front of 
> the daemons and to which queries in various formats wil be submitted.
> It would need to allow for the following:
> - submit queries
> - submit logical plans
> - submit physical plans for execution
> - query underlying storage engines for metadata and statistics
> - possibly serve as a frontend to a metadata store
>  

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