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Posted to hdfs-issues@hadoop.apache.org by "Haohui Mai (JIRA)" <ji...@apache.org> on 2013/09/20 00:29:52 UTC

[jira] [Updated] (HDFS-5230) Introduce RpcInfo to decouple XDR classes from the RPC API

     [ https://issues.apache.org/jira/browse/HDFS-5230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Haohui Mai updated HDFS-5230:
-----------------------------

    Summary: Introduce RpcInfo to decouple XDR classes from the RPC API  (was: Introduce RPCInfo to decouple XDR classes from the RPC API)
    
> 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
>          Components: nfs
>            Reporter: Haohui Mai
>            Assignee: Haohui Mai
>         Attachments: HDFS-5230.000.patch, HDFS-5230.001.patch
>
>
> 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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