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https://issues.apache.org/jira/browse/HADOOP-7776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13140285#comment-13140285
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Doug Cutting commented on HADOOP-7776:
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This looks good.
If you wanted to make this more easily extensible (HADOOP-7557) then you might
change it to have a <<key,value> format, perhaps where keys are vints and
values are <vint><payload>. If you put the current three values (kind, op, id)
then its size would grow from 6 to perhaps 10 bytes. Alternately you could add
a metadata field <count, <key,value>> for future use which would only add a
single byte but wouldn't let you ever remove one of the initial three fields.
Per-call metadata would make it easier to add, e.g., Dapper-style tracing.
> Make the Ipc-Header in a RPC-Payload an explicit header
> -------------------------------------------------------
>
> Key: HADOOP-7776
> URL: https://issues.apache.org/jira/browse/HADOOP-7776
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Sanjay Radia
> Assignee: Sanjay Radia
> Attachments: RpcPayLoadHeader.java, rpcPayload1.patch,
> rpcPayload2.patch
>
>
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