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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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ASF GitHub Bot updated HDFS-16088:
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    Labels: pull-request-available  (was: )

> 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: Minor
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> As with [HDFS-13183|https://issues.apache.org/jira/browse/HDFS-13183], 
> NameNodeConnector#getLiveDatanodeStorageReport() can also request to SNN to 
> reduce the ANN load.
> There are two points that need to be mentioned:
> 1. NameNodeConnector#getLiveDatanodeStorageReport() is 
> OperationCategory.UNCHECKED in FSNamesystem, so we can access SNN directly.
> 2. We can share the same UT(testBalancerRequestSBNWithHA) with 
> NameNodeConnector#getBlocks().



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