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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1675) Transfer RBW between datanodes
Date Fri, 11 Mar 2011 03:05:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13005467#comment-13005467
] 

Tsz Wo (Nicholas), SZE commented on HDFS-1675:
----------------------------------------------

In order to make sure the patch is useful for HDFS-1606, Jitendra and I came up with the following
cases.
- Case 1: Failure in Pipeline Setup 
-* *Append*
-** Transfer the stored replica, which may be a RBW or a finalized replica.
-* *Create*
-** If no data, then no transfer is required.
-** If there are data written, transfer RBW.  This case may happens when there are streaming
failure earlier in this pipeline.
- Case 2: Failure in Streaming or Close
-* *Append/Create*:
-** transfer RBW

Therefore, a method is required to supporting transferring the stored replica, RBW or finalized,
of the source datanode.  It should return visible length, stored GS and whether it is a RBW.

> Transfer RBW between datanodes
> ------------------------------
>
>                 Key: HDFS-1675
>                 URL: https://issues.apache.org/jira/browse/HDFS-1675
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: data-node
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>         Attachments: h1675_20110228.patch, h1675_20110228b.patch, h1675_20110308.patch,
h1675_20110310.patch, h1675_20110310b.patch
>
>
> This is the step \(*) described [here|https://issues.apache.org/jira/browse/HDFS-1606?focusedCommentId=12991321&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-12991321].

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