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From "Mingliang Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13435) Add thread local mechanism for aggregating file system storage stats
Date Wed, 05 Jul 2017 18:37:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16075214#comment-16075214
] 

Mingliang Liu commented on HADOOP-13435:
----------------------------------------

Hi [~Hongyuan Li], thanks for the comment. But I think the {{FileSystem#Cache}} are are not
related to this patch. We can file separate JIRA for moving the nested class out of the long
FileSystem class.

> 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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