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From "Sangjin Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4053) Change the way metric values are stored in HBase Storage
Date Mon, 17 Aug 2015 22:51:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-4053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14700378#comment-14700378
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Sangjin Lee commented on YARN-4053:
-----------------------------------

Thanks [~varun_saxena] for pointing out an important issue. I would agree with [~gtCarrera9]
that this is bit lower in priority compared to YARN-3814, but it's an important issue nonetheless.

I'm just curious (and perhaps this is a totally dumb question for a HBase newbie), is there
a way to specify that the value type is a numeric type when we create the table or the column
family? Does HBase itself support something like that?

> 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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