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From "Li Lu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4053) Change the way metric values are stored in HBase Storage
Date Mon, 17 Aug 2015 18:24:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-4053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14699971#comment-14699971
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Li Lu commented on YARN-4053:
-----------------------------

bq. Oh sorry in my original comment, I meant that we can carry this logic over to other columns(not
only metrics). 
This looks good. 

bq. I agree we can include type information in TimelineMetric object itself. That will be
better. 
Actually I believe we *are* carrying type information in TimelineMetrics, in the original
(boxed) Java form. For now I think we're fine to move with float and long. 

> Change the way metric values are stored in HBase Storage
> --------------------------------------------------------
>
>                 Key: YARN-4053
>                 URL: https://issues.apache.org/jira/browse/YARN-4053
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: YARN-2928
>            Reporter: Varun Saxena
>            Assignee: Varun Saxena
>         Attachments: YARN-4053-YARN-2928.01.patch
>
>
> Currently HBase implementation uses GenericObjectMapper to convert and store values in
backend HBase storage. This converts everything into a string representation(ASCII/UTF-8 encoded
byte array).
> While this is fine in most cases, it does not quite serve our use case for metrics. 
> So we need to decide how are we going to encode and decode metric values and store them
in HBase.
>  



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