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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-204) Revive number of files listed metrics
Date Tue, 02 Mar 2010 06:17:27 GMT

     [ https://issues.apache.org/jira/browse/HDFS-204?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Hairong Kuang updated HDFS-204:

    Attachment: getFileNum-yahoo20.patch

This patch ported the feature to Yahoo 20 branch. In addition, it fixed the bug that NPE will
be thrown when getListing on a non-existent path and I also added two more test cases, one
is listing a non-existent path and one is listing path represented a file.

> Revive number of files listed metrics
> -------------------------------------
>                 Key: HDFS-204
>                 URL: https://issues.apache.org/jira/browse/HDFS-204
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: name-node
>    Affects Versions: 0.21.0
>            Reporter: Koji Noguchi
>            Assignee: Jitendra Nath Pandey
>             Fix For: 0.21.0
>         Attachments: getFileNum-yahoo20.patch, HDFS-204-2.patch, HDFS-204-2.patch, HDFS-204.patch,
> When namenode becomes unresponsive by HADOOP-4693 (large filelist calls), metrics has
been helpful in finding out the cause.
> When gc time hikes, "FileListed" metrics also hiked.
> In 0.18, after we *fixed* "FileListed" metrics so that it shows number of operations
instead of number of files listed (HADOOP-3683), I stopped seeing this relationship graph.
> Can we bring back "NumbverOfFilesListed" metrics?

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