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https://issues.apache.org/jira/browse/YARN-3041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14325467#comment-14325467
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Zhijie Shen edited comment on YARN-3041 at 2/18/15 6:10 AM:
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bq. I think the run id of a flow is an attribute of a flow, it need not be a 
separate class.

So what's the difference between flow and flow run? On page.5 of the design doc 
v2, it seems that flow run is the child of flow. [~sjlee0], would you please 
comment?

BTW, if this is the case, flow needs to be nested, and app should be the child 
of flow.

bq. Also, queue and user are timeline entities, I think if they may not require 
a class by themselves.

Do you mean they need to extend timeline entity? I think in the new patch, they 
do it in this way.


was (Author: zjshen):
bq. I think the run id of a flow is an attribute of a flow, it need not be a 
separate class.

So what's the difference between flow and flow run? On page.5 of the design doc 
v2, it seems that flow run is the child of flow. [~sjlee0], would you please 
comment?

bq. Also, queue and user are timeline entities, I think if they may not require 
a class by themselves.

Do you mean they need to extend timeline entity? I think in the new patch, they 
do it in this way.

> [Data Model] create overall data objects of TS next gen
> -------------------------------------------------------
>
>                 Key: YARN-3041
>                 URL: https://issues.apache.org/jira/browse/YARN-3041
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Zhijie Shen
>         Attachments: Data_model_proposal_v2.pdf, YARN-3041.2.patch, 
> YARN-3041.3.patch, YARN-3041.4.patch, YARN-3041.preliminary.001.patch
>
>
> Per design in YARN-2928, create the ATS entity and events API.
> Also, as part of this JIRA, create YARN system entities (e.g. cluster, user, 
> flow, flow run, YARN app, ...).



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