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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3429) Increase the buffersize for the streaming parent java process's streams
Date Mon, 30 Jun 2008 22:02:45 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Chansler updated HADOOP-3429:
------------------------------------

    Release Note: Increased the size of the buffer used in the communication between the Java
task and the Streaming process to 128KB.  (was: Increases the size of the buffersize used
in the communication between the Java task and the Streaming process to 128K. Gives performance
improvements.)

> Increase the buffersize for the streaming parent java process's streams
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-3429
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3429
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/streaming
>            Reporter: Devaraj Das
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 0.18.0
>
>         Attachments: patch-3429.txt
>
>
> We saw improved performance when we increased the buffersize for Pipes (HADOOP-1788).
In the streaming case, the buffersize is 8K (default for BufferedOutputStream). We should
set that to 128k.

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