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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-764) The memory consumption of processReport() in the namenode can be reduced
Date Thu, 07 Dec 2006 13:55:28 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-764?page=all ]

dhruba borthakur updated HADOOP-764:
------------------------------------

    Status: Patch Available  (was: Open)

This patch reduces namenode's memory consumption while processing block reports.  

> The memory consumption of processReport() in the namenode can be reduced
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-764
>                 URL: http://issues.apache.org/jira/browse/HADOOP-764
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>            Reporter: dhruba borthakur
>         Assigned To: dhruba borthakur
>         Attachments: processBlockReport3.patch
>
>
> The FSNamesystem.processReport() method converts the blocklist for a datanode into an
array by calling node.getBlocks(). Although this memory allocation is transient, it could
possibly require the garbage-collector to work that much harder. 
> The method Block.getBlocks() should be deprecated. Code that currently uses this method
should instead iterate over the Collection.

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