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https://issues.apache.org/jira/browse/HADOOP-1268?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Shvachko updated HADOOP-1268:
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    Component/s: dfs

> Replace Vector types by ArrayList in FSDirectory
> ------------------------------------------------
>
>                 Key: HADOOP-1268
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1268
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: dfs
>    Affects Versions: 0.10.0, 0.11.0, 0.12.0
>            Reporter: Konstantin Shvachko
>             Fix For: 0.13.0
>
>
> FSDirectory contains local variables that are declared Vector but are used 
> within a
> synchronized{ ... } block. Extra synchronization provided by Vector is 
> redundant in the case.
> Using ArrayLists instead should boost the performance.

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