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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-764) The memory consumption of processReport() in the namenode can be reduced
Date Thu, 07 Dec 2006 22:59:22 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-764?page=comments#action_12456626 ] 
dhruba borthakur commented on HADOOP-764:

I agree with your observation. This is another level of refinement that we could do as a follow-on
to this patch. Does it sound ok?

> 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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