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https://issues.apache.org/jira/browse/HADOOP-6356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12790462#action_12790462
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Tsz Wo (Nicholas), SZE commented on HADOOP-6356:
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Since FileSystem objects themselves are pretty lightweights (not counting RPC
connections since there is a RPC cache), I suggest that we only add a table,
instead of a cache, to FileContext. The table will be used for FileSystem
cleanup during shutdown and processing delete-on-exit files. The table cannot
be implemented in AbstractFileSystem since there may be symbolic links when
processing delete-on-exit files.
> Add a Cache for AbstractFileSystem in the new FileContext/AbstractFileSystem
> framework.
> ---------------------------------------------------------------------------------------
>
> Key: HADOOP-6356
> URL: https://issues.apache.org/jira/browse/HADOOP-6356
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 0.22.0
> Reporter: Sanjay Radia
> Assignee: Sanjay Radia
> Fix For: 0.22.0
>
>
> The new filesystem framework, FileContext and AbstractFileSystem does not
> implement a cache for AbstractFileSystem.
> This Jira proposes to add a cache to the new framework just like with the old
> FileSystem.
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