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From "Sangjin Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3047) [Data Serving] Set up ATS reader with basic request serving structure and lifecycle
Date Tue, 30 Jun 2015 21:55:05 GMT

    [ https://issues.apache.org/jira/browse/YARN-3047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14609143#comment-14609143
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Sangjin Lee commented on YARN-3047:
-----------------------------------

{quote}
2. I didn't see the web app module in the patch. Do we consider install the web UI on the
reader instance together with web services? Web UI has two forms in ATS v1. One is like generic
history web UI, which is hosted side-by-side with the web services in timeline server, and
which reads the data from the backend directly. The other is like Tez web UI, which is actually
the consumer of the web services/timeline server.
{quote}

The reader generic web UI is definitely something we need, but that is a fairly big piece
that requires some design. Can we capture that in a separate ticket?

{quote}
3. Not sure if we have already clarified it or not, but I remember we have some offline discussion
on where to trigger the HBase coprocessor (for aggregation purpose), and it was said to use
reader instance as the central point. We should think of it when constructing the reader stack
too.
{quote}

Could you kindly give me some context on this? I don't recall under what scenarios we were
thinking of triggering the co-processor on the *read* path...

> [Data Serving] Set up ATS reader with basic request serving structure and lifecycle
> -----------------------------------------------------------------------------------
>
>                 Key: YARN-3047
>                 URL: https://issues.apache.org/jira/browse/YARN-3047
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: YARN-2928
>            Reporter: Sangjin Lee
>            Assignee: Varun Saxena
>              Labels: BB2015-05-TBR
>         Attachments: Timeline_Reader(draft).pdf, YARN-3047-YARN-2928.08.patch, YARN-3047-YARN-2928.09.patch,
YARN-3047.001.patch, YARN-3047.003.patch, YARN-3047.005.patch, YARN-3047.006.patch, YARN-3047.007.patch,
YARN-3047.02.patch, YARN-3047.04.patch
>
>
> Per design in YARN-2938, set up the ATS reader as a service and implement the basic structure
as a service. It includes lifecycle management, request serving, and so on.



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