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https://issues.apache.org/jira/browse/HDFS-8008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14389439#comment-14389439
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Haohui Mai commented on HDFS-8008:
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This patch implements the decorrelated exponential backoff mechanism described
in http://www.awsarchitectureblog.com/2015/03/backoff.html when it discovers
that there is at least one data node in the pipeline is in congested state.
> Support client-side back off when the datanodes are congested
> -------------------------------------------------------------
>
> Key: HDFS-8008
> URL: https://issues.apache.org/jira/browse/HDFS-8008
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Haohui Mai
> Assignee: Haohui Mai
> Attachments: HDFS-8008.000.patch
>
>
> HDFS-7270 introduces the mechanism for DataNode to signal congestions.
> DFSClient should be able to recognize the signals and back off.
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