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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-803) Reducing memory consumption on Namenode : Part 1
Date Wed, 13 Dec 2006 04:22:22 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-803?page=all ]

Raghu Angadi updated HADOOP-803:
--------------------------------

    Attachment: block-refs.patch

Now datanode's blocks is defined as TreeMap. 

I am attaching the proposed patch for review. I have done brief testing and will test with
manually deleting some blocks from the datanode to trigger new code.


> Reducing memory consumption on Namenode : Part 1
> ------------------------------------------------
>
>                 Key: HADOOP-803
>                 URL: http://issues.apache.org/jira/browse/HADOOP-803
>             Project: Hadoop
>          Issue Type: Bug
>            Reporter: Raghu Angadi
>         Assigned To: Raghu Angadi
>         Attachments: block-refs.patch
>
>
> There appears to be some places in Namenode that allow reducing memory consumption without
intrusive code or feature changes. This bug is an initial attempt making those changes. Please
include your thoughts as well. 
> One change I am planning to make : 
> Currently one copy of each block exists for each of the replicas and one copy for blockMap.
I think they are all supposed to be same.

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