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From "Haohui Mai (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7270) Implementing congestion control in writing pipeline
Date Fri, 14 Nov 2014 01:35:37 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Haohui Mai updated HDFS-7270:
-----------------------------
    Status: Patch Available  (was: Open)

> Implementing congestion control in writing pipeline
> ---------------------------------------------------
>
>                 Key: HDFS-7270
>                 URL: https://issues.apache.org/jira/browse/HDFS-7270
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>            Reporter: Haohui Mai
>            Assignee: Haohui Mai
>         Attachments: HDFS-7270.000.patch
>
>
> When a client writes to HDFS faster than the disk bandwidth of the DNs, it  saturates
the disk bandwidth and put the DNs unresponsive. The client only backs off by aborting / recovering
the pipeline, which leads to failed writes and unnecessary pipeline recovery.
> This jira proposes to add explicit congestion control mechanisms in the writing pipeline.




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