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From "Vrushali C (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3031) [Storage abstraction] Create backing storage write interface for ATS writers
Date Thu, 12 Feb 2015 18:18:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-3031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14318680#comment-14318680
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Vrushali C commented on YARN-3031:
----------------------------------

hi [~djp],
Thanks for looking at this! Yes, the calls from client (like AM) to write an entity info could
be sync ( blocking) or async (non-blocking), but the storage writer api (TimelineServiceWriter)
calls are always synchronous (blocking).  The Base Aggregator Service would provide both options
of writes (sync and async) in it's API. Would be part of YARN-3167 I think.

I have modified the sequence diagram to say that calls from AM to Base Aggregator Service
can be sync or async.

thanks
Vrushali





> [Storage abstraction] Create backing storage write interface for ATS writers
> ----------------------------------------------------------------------------
>
>                 Key: YARN-3031
>                 URL: https://issues.apache.org/jira/browse/YARN-3031
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Vrushali C
>         Attachments: Sequence_diagram_write_interaction.png, YARN-3031.01.patch
>
>
> Per design in YARN-2928, come up with the interface for the ATS writer to write to various
backing storages. The interface should be created to capture the right level of abstractions
so that it will enable all backing storage implementations to implement it efficiently.



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