[jira] Commented: (HADOOP-6244) Improvements to FileContext metrics output formatting

["Steve Loughran (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-6244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12865810#action_12865810 ] 

Steve Loughran commented on HADOOP-6244:
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I'm +1 to timestamps, worried about breaking things
# HBASE-1021 added timestamps to HBase metrics; without breaking the existing code. But subclasses like that can break too.
# I'd prefer to have a new class/subclass to do the timestamps. This could be added to the classpath to 0.20.x clusters to get timestamping without needing a new hadoop JAR and not break HBase or other apps. Things like JSON will be handy but again, separate. We can evolve this at a faster rate than the main h-common release process


> Improvements to FileContext metrics output formatting
> -----------------------------------------------------
>
>                 Key: HADOOP-6244
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6244
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: metrics
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.22.0
>
>         Attachments: hadoop-6244.txt
>
>
> The output of FileContext has two big issues: 1) it doesn't include a timestamp, 2) it doesn't differentiate between tags and metrics in formatting. This patch is to improve the output format to be more useful.

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