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From "Hongyuan Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13435) Add thread local mechanism for aggregating file system storage stats
Date Mon, 03 Jul 2017 12:25:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16072341#comment-16072341
] 

Hongyuan Li commented on HADOOP-13435:
--------------------------------------

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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