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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3283) Need a mechanism for data nodes to update generation stamps.
Date Thu, 24 Apr 2008 05:49:21 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12591926#action_12591926
] 

dhruba borthakur commented on HADOOP-3283:
------------------------------------------

1. The two new methods in the InterDatanodeProtocol should take a Block object as the first
parameter.
2. The MiniDFSCluster should have a method named getDatanode.getDataNode() that returns an
object of type InterDatanodeProtocol. This will allow tests to easily invoke RPCs in the InterDatanodeProtocol.



> 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
>         Attachments: 3283_20080423c.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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