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From "Sangjin Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4074) [timeline reader] implement support for querying for flows and flow runs
Date Mon, 24 Aug 2015 21:57:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-4074?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14710133#comment-14710133

Sangjin Lee commented on YARN-4074:

Actually the backend will need to differentiate the queries for flows and flow runs from those
for other entities, right? For the HBase backend, queries for the flows will need to be sent
to the flow activity table, those for the flow runs will be sent to the flow run table. This
also implies that the canonical stores for the flows and the flow runs are the flow activity
table and the flow run table respectively...

We've already gone that way a little bit with the application table, and we need to be comfortable
with that for us to implement the latter approach.

> [timeline reader] implement support for querying for flows and flow runs
> ------------------------------------------------------------------------
>                 Key: YARN-4074
>                 URL: https://issues.apache.org/jira/browse/YARN-4074
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: YARN-2928
>            Reporter: Sangjin Lee
>            Assignee: Sangjin Lee
> Implement support for querying for flows and flow runs.
> We should be able to query for the most recent N flows, etc.
> This includes changes to the {{TimelineReader}} API if necessary, as well as implementation
of the API.

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