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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9239) DataNode Lifeline Protocol: an alternative protocol for reporting DataNode liveness
Date Fri, 04 Mar 2016 21:00:42 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15180528#comment-15180528
] 

Tsz Wo Nicholas Sze commented on HDFS-9239:
-------------------------------------------

+1 the new patch looks good.  Thanks for the update.

> DataNode Lifeline Protocol: an alternative protocol for reporting DataNode liveness
> -----------------------------------------------------------------------------------
>
>                 Key: HDFS-9239
>                 URL: https://issues.apache.org/jira/browse/HDFS-9239
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: datanode, namenode
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>         Attachments: DataNode-Lifeline-Protocol.pdf, HDFS-9239.001.patch, HDFS-9239.002.patch,
HDFS-9239.003.patch
>
>
> This issue proposes introduction of a new feature: the DataNode Lifeline Protocol.  This
is an RPC protocol that is responsible for reporting liveness and basic health information
about a DataNode to a NameNode.  Compared to the existing heartbeat messages, it is lightweight
and not prone to resource contention problems that can harm accurate tracking of DataNode
liveness currently.  The attached design document contains more details.



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