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From "Ramkumar Vadali (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-1461) Refactor hdfs.server.datanode.BlockSender
Date Tue, 23 Nov 2010 21:52:16 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1461?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Ramkumar Vadali updated HDFS-1461:

    Attachment: HDFS-1461.patch

This patch introduces a RAID-friendly constructor for {{BlockSender}}. This constructor does
not need a {{DataNode}} object, and works with streams instead. The common code between the
new and old constructors is refactored to a function {{initialize()}}

I ran the HDFS unit tests and I did not see any new failure from trunk.

> Refactor hdfs.server.datanode.BlockSender
> -----------------------------------------
>                 Key: HDFS-1461
>                 URL: https://issues.apache.org/jira/browse/HDFS-1461
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node
>            Reporter: Ramkumar Vadali
>            Assignee: Ramkumar Vadali
>         Attachments: HDFS-1461.patch
> BlockSender provides the functionality to send a block to a data node. But the current
implementation requires the source of the block to be a data node. The RAID contrib project
needs the functionality of sending a block to a data node, but cannot use hdfs.server.datanode.BlockSender
because the constructor requires a datanode object.
> MAPREDUCE-2132 provides the motivation for this.
> The purpose of this jira is to refactor hdfs.server.datanode.BlockSender to have another
constructor that does not need a DataNode object.

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