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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3283) Need a mechanism for data nodes to update generation stamps.
Date Mon, 30 Jun 2008 21:50:45 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3283?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Chansler updated HADOOP-3283:
------------------------------------

    Release Note: 
Added an IPC server in DataNode and a new IPC protocol InterDatanodeProtocol.  Added conf
properties dfs.datanode.ipc.address and dfs.datanode.handler.count with defaults "0.0.0.0:50020"
and 3, respectively.
Changed the serialization in DatanodeRegistration and DatanodeInfo, and therefore, updated
the versionID in ClientProtocol, DatanodeProtocol, NamenodeProtocol.

  was:
Incompatible changes:
- Added an IPC server in DataNode and a new IPC protocol InterDatanodeProtocol.  Added conf
properties dfs.datanode.ipc.address and dfs.datanode.handler.count with defaults "0.0.0.0:50020"
and 3, respectively.
- Changed the serialization in DatanodeRegistration and DatanodeInfo, and therefore, updated
the versionID in ClientProtocol, DatanodeProtocol, NamenodeProtocol.

    Hadoop Flags: [Incompatible change, Reviewed]  (was: [Reviewed, Incompatible change])

> Need a mechanism for data nodes to update generation stamps.
> ------------------------------------------------------------
>
>                 Key: HADOOP-3283
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3283
>             Project: Hadoop Core
>          Issue Type: New Feature
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>             Fix For: 0.18.0
>
>         Attachments: 3283_20080423c.patch, 3283_20080424.patch, 3283_20080425versionID.patch
>
>
> For implementing file append feature (HADOOP-1700), a generation stamp is added to each
block.  We need a mechanism for data nodes to update generation stamps for lease recovery.

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