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Posted to common-dev@hadoop.apache.org by "Robert Chansler (JIRA)" <ji...@apache.org> on 2008/07/01 00:02:45 UTC

[jira] Updated: (HADOOP-3429) Increase the buffersize for the streaming parent java process's streams

     [ 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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