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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-892) optionally use Avro for namenode RPC
Date Wed, 24 Mar 2010 18:25:27 GMT

     [ https://issues.apache.org/jira/browse/HDFS-892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Doug Cutting updated HDFS-892:
------------------------------

    Attachment: HDFS-892.patch

> all the changes are compatible changes except renaming register(..) to registerDatanode(..)
in DatanodeProtocol. So the protocol version have to be updated.

Thanks for catching that!  I've attached a new version that updates this.

> Do we need a versionID for the new NamenodeProtocols?

I don't think so, clients are not permitted to use that interface.  NameNode's getProtocolVersion()
implementation dispatches depending on the client's protocol.  If a client tried to connect
 using the NamenodeProtocols interface, then that method will fail with "unknown protocol".


> optionally use Avro for namenode RPC
> ------------------------------------
>
>                 Key: HDFS-892
>                 URL: https://issues.apache.org/jira/browse/HDFS-892
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>            Reporter: Doug Cutting
>            Assignee: Doug Cutting
>             Fix For: 0.22.0
>
>         Attachments: HDFS-892.patch, HDFS-892.patch, HDFS-892.patch, HDFS-892.patch,
HDFS-892.patch, HDFS-892.patch
>
>
> It should be possible to configure HDFS so that Avro is used for RPCs to the namenode.

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