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https://issues.apache.org/jira/browse/HADOOP-3272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12590642#action_12590642
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Tsz Wo (Nicholas), SZE commented on HADOOP-3272:
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+1 patch looks good.
In this case we don't really need to store BlockInfo reference twice (as key
and value). If we implement our hash table, we can reduce one reference per
entry.
> Reduce redundant copy of Block object in BlocksMap.map hash map
> ---------------------------------------------------------------
>
> Key: HADOOP-3272
> URL: https://issues.apache.org/jira/browse/HADOOP-3272
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Environment: All
> Reporter: lohit vijayarenu
> Assignee: lohit vijayarenu
> Fix For: 0.18.0
>
> Attachments: HADOOP-3272.patch
>
>
> Looks like we might have redundant copy of Block object as Key for
> BlocksMap.map hash map. We should restore this to using same object for both
> Key, Value to save space.
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