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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 Tue, 18 Oct 2011 21:25:10 GMT

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

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

    Attachment: daulBr1.patch

Partial early patch - not complete.
                
> 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
>
>
> 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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