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Date: Thu, 19 Sep 2013 18:37:51 +0000 (UTC)
From: "Haohui Mai (JIRA)" <jira@apache.org>
To: hdfs-dev@hadoop.apache.org
Message-ID: <JIRA.12669507.1379615763564.163568.1379615871653@arcas>
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Subject: [jira] [Created] (HDFS-5230) Introduce RPCInfo to decouple XDR
 classes from the RPC API
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Haohui Mai created HDFS-5230:
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             Summary: Introduce RPCInfo to decouple XDR classes from the RPC API
                 Key: HDFS-5230
                 URL: https://issues.apache.org/jira/browse/HDFS-5230
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Haohui Mai
            Assignee: Haohui Mai


The XDR class is one fundamental aspect in the current implementation of NFS server. While the client might potentially have a higher level APIs, it also requires redundant copying since the upstream clients have insufficient information.

This JIRA introduces a new class, RPCInfo, which (1) decouples XDR from the APIs, turning it into a utility class, and (2) exposes ChannelBuffer directly to the client in order to open the opportunity for avoid copying.

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