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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6214) Webhdfs has poor throughput for files >2GB
Date Wed, 16 Apr 2014 16:24:21 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13971611#comment-13971611
] 

Hudson commented on HDFS-6214:
------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #5525 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/5525/])
HDFS-6214.  Webhdfs has poor throughput for files >2GB (daryn) (daryn: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1587954)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/web/resources/DatanodeWebHdfsMethods.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/web/resources/OpenEntity.java


> Webhdfs has poor throughput for files >2GB
> ------------------------------------------
>
>                 Key: HDFS-6214
>                 URL: https://issues.apache.org/jira/browse/HDFS-6214
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 2.0.0-alpha, 3.0.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>             Fix For: 3.0.0, 2.5.0
>
>         Attachments: HDFS-6214.patch
>
>
> For the DN's open call, jetty returns a Content-Length header for files <2GB, and
uses chunking for files >2GB.  A "bug" in jetty's buffer handling results in a ~8X reduction
in throughput.



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