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From "Sanjay Radia (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-1971) HA: Send block report from datanode to both active and standby namenodes
Date Wed, 30 Nov 2011 22:23:39 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sanjay Radia updated HDFS-1971:
-------------------------------

    Attachment: dualBr6.patch

Updated patch.
Todd I can commit this if you are okay with the changes I made.
                
> 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
>         Attachments: DualBlockReports.pdf, daulBr1.patch, dualBr2.patch, dualBr3.patch,
dualBr6.patch, dualbr4.txt, dualbr5.txt
>
>
> 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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