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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3411) [Storage implementation] explore the native HBase write schema for storage
Date Wed, 27 May 2015 20:40:42 GMT

    [ https://issues.apache.org/jira/browse/YARN-3411?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14561682#comment-14561682
] 

Zhijie Shen commented on YARN-3411:
-----------------------------------

Yeah, in v1, there's a starttime for entity, which is used to indicate when the entity starts
to exist. This value is used in multiple places. For example, when we query entities, the
matched entities are sorted according to timestamp to be returned. Also, in v1 the retention
granularity is at entity level. We check if the starttime of an entity is out of TTL, and
then decide to discard it and its events.

> [Storage implementation] explore the native HBase write schema for storage
> --------------------------------------------------------------------------
>
>                 Key: YARN-3411
>                 URL: https://issues.apache.org/jira/browse/YARN-3411
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Vrushali C
>            Priority: Critical
>             Fix For: YARN-2928
>
>         Attachments: ATSv2BackendHBaseSchemaproposal.pdf, YARN-3411-YARN-2928.001.patch,
YARN-3411-YARN-2928.002.patch, YARN-3411-YARN-2928.003.patch, YARN-3411-YARN-2928.004.patch,
YARN-3411-YARN-2928.005.patch, YARN-3411-YARN-2928.006.patch, YARN-3411-YARN-2928.007.patch,
YARN-3411.poc.2.txt, YARN-3411.poc.3.txt, YARN-3411.poc.4.txt, YARN-3411.poc.5.txt, YARN-3411.poc.6.txt,
YARN-3411.poc.7.txt, YARN-3411.poc.txt
>
>
> There is work that's in progress to implement the storage based on a Phoenix schema (YARN-3134).
> In parallel, we would like to explore an implementation based on a native HBase schema
for the write path. Such a schema does not exclude using Phoenix, especially for reads and
offline queries.
> Once we have basic implementations of both options, we could evaluate them in terms of
performance, scalability, usability, etc. and make a call.



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