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From "Sanjay Radia (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1971) HA: Send block report from datanode to both active and standby namenodes
Date Thu, 11 Aug 2011 18:38:28 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13083349#comment-13083349
] 

Sanjay Radia commented on HDFS-1971:
------------------------------------

I have started to work on this and will post the design in a couple of days followed by the
patch. 

> HA: Send block report from datanode to both active and standby namenodes
> ------------------------------------------------------------------------
>
>                 Key: HDFS-1971
>                 URL: https://issues.apache.org/jira/browse/HDFS-1971
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: data-node, name-node
>            Reporter: Suresh Srinivas
>            Assignee: Sanjay Radia
>
> To enable hot standby namenode, the standby node must have current information for -
namenode state (image + edits) and block location information. This jira addresses keeping
the block location information current in the standby node. To do this, the proposed solution
is to send block reports from the datanodes to both the active and the standby namenode.

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