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  1. Hadoop Common
  2. HADOOP-4813

Avoid a buffer copy while replying to RPC requests.

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    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Incomplete
    • None
    • None
    • ipc

    Description

      RPC server first serializes RPC response to a ByteArrayOutputStream and then creates a new array to write to socket. For most responses the RPC handler is able to write the entire response in-line. If we could use the same buffer used by ByteArrayOutputStream, we can avoid this copy.

      As mentioned in HADOOP-4802, yet another copy could be avoided (in most cases) if we use a static direct buffer for the responses (not proposed for this jira).

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            Unassigned Unassigned
            rangadi Raghu Angadi
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