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https://issues.apache.org/jira/browse/HADOOP-13435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16072341#comment-16072341
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Hongyuan Li commented on HADOOP-13435:
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should FileSystem#Cache be set as a single class and and a {{list}} method to
make it easier for debugging?
> Add thread local mechanism for aggregating file system storage stats
> --------------------------------------------------------------------
>
> Key: HADOOP-13435
> URL: https://issues.apache.org/jira/browse/HADOOP-13435
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs
> Reporter: Mingliang Liu
> Assignee: Mingliang Liu
> Attachments: HADOOP-13435.000.patch, HADOOP-13435.001.patch,
> HADOOP-13435.002.patch
>
>
> As discussed in [HADOOP-13032], this is to add thread local mechanism for
> aggregating file system storage stats. This class will also be used in
> [HADOOP-13031], which is to separate the distance-oriented rack-aware read
> bytes logic from {{FileSystemStorageStatistics}} to new
> DFSRackAwareStorageStatistics as it's DFS-specific. After this patch, the
> {{FileSystemStorageStatistics}} can live without the to-be-removed
> {{FileSystem$Statistics}} implementation.
> A unit test should also be added.
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