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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8008) Support client-side back off when the datanodes are congested
Date Thu, 02 Apr 2015 01:54:54 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14391952#comment-14391952
] 

Hudson commented on HDFS-8008:
------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #7490 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/7490/])
HDFS-8008. Support client-side back off when the datanodes are congested. Contributed by Haohui
Mai. (wheat9: rev 6ccf4fbf8a8374c289370f67b26ac05abad30ebc)
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DataStreamer.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/datatransfer/PipelineAck.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSOutputStream.java


> 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
>          Components: hdfs-client
>            Reporter: Haohui Mai
>            Assignee: Haohui Mai
>             Fix For: 2.8.0
>
>         Attachments: HDFS-8008.000.patch, HDFS-8008.001.patch, HDFS-8008.002.patch, HDFS-8008.003.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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