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https://issues.apache.org/jira/browse/HDFS-1971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sanjay Radia updated HDFS-1971:
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Attachment: dualBr3.patch
Updated patch. Still a draft but good enough to read and get feedback.
* Block report additions and deletions are
give to both BPService thread (for active and standby)
* BRs as per option 2: are created for each thread separately (note BR is
created from in-memory BMap). Optimization 1 or 3 is under consideration.
> 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
>
>
> 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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