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https://issues.apache.org/jira/browse/HDFS-16088?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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tomscut updated HDFS-16088:
---------------------------
    Priority: Major  (was: Minor)

> Standby NameNode process getLiveDatanodeStorageReport request to reduce 
> Active load
> -----------------------------------------------------------------------------------
>
>                 Key: HDFS-16088
>                 URL: https://issues.apache.org/jira/browse/HDFS-16088
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: tomscut
>            Assignee: tomscut
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: standyby-ipcserver.jpg
>
>          Time Spent: 2h 40m
>  Remaining Estimate: 0h
>
> As with HDFS-13183, NameNodeConnector#getLiveDatanodeStorageReport() can also 
> request to SNN to reduce the ANN load.
> There are two points that need to be mentioned:
>  1. FSNamesystem#getDatanodeStorageReport() is OperationCategory.UNCHECKED, 
> so we can access SNN directly.
>  2. We can share the same UT(testBalancerRequestSBNWithHA) with 
> NameNodeConnector#getBlocks().



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