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https://issues.apache.org/jira/browse/HDFS-16320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17443268#comment-17443268
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Xiaoqiao He commented on HDFS-16320:
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Thanks [~Symious] for your report and patch. IMO it is a little tricky for
DataNode to get the slownode status from NameNode. In theory, DataNode has the
total information to decide if it is slow by itself rather than following
NameNode command. Would you mind to offer some more information about your plan
to using this status? Thanks.
> Datanode retrieve slownode information from NameNode
> ----------------------------------------------------
>
> Key: HDFS-16320
> URL: https://issues.apache.org/jira/browse/HDFS-16320
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Janus Chow
> Assignee: Janus Chow
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> The current information of slownode is reported by reportingNode, and stored
> in NameNode.
> This ticket is to let the slownode retrieve the information from NameNode, so
> that it can do other performance improvement actions based on this
> information.
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