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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3031) [Storage abstraction] Create backing storage write interface for ATS writers
Date Thu, 12 Feb 2015 17:23:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-3031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14318576#comment-14318576
] 

Junping Du commented on YARN-3031:
----------------------------------

Thanks [~vrushalic] for updating the patch and sequence diagram here!
One quick question about sequence diagram: looks like we are doing async call (non-blocking
call) between AM and BaseAggregatorService here. Do have some scenarios that AM write some
entities/event and check them immediately? If so, we may need to find some way to notify AM
about the result of writing (it may get failed, so AM can redo it later) or we also provide
a blocking call option? 

> [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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