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https://issues.apache.org/jira/browse/HDFS-839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12803076#action_12803076
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Eli Collins commented on HDFS-839:
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We should really figure out the requirements and specifics of the feature we're
after before addressing details like how we handle block reports.
Whether the NN or the DNs forward block reports to the BN(s) should be
considered in the context of the overall design. eg above people have been
making assumptions (eg the NN has to establish a pipeline to the BN(s) to
forward block reports) that may or may not hold.
> The NameNode should forward block reports to BackupNode
> -------------------------------------------------------
>
> Key: HDFS-839
> URL: https://issues.apache.org/jira/browse/HDFS-839
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: name-node
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
>
> The BackupNode (via HADOOP-4539) receives a stream of transactions from
> NameNode. However, the BackupNode does not have block locations of blocks. It
> would be nice if the NameNode can forward all block reports (that it receives
> from DataNodes) to the BackupNode.
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