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https://issues.apache.org/jira/browse/YARN-3411?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14553353#comment-14553353
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Vrushali C commented on YARN-3411:
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bq. Or we cannot diff value with null and real 0.
Hi Junping,
So, currently, you are right, we can't differentiate between nulls and real 0.
In hRaven, we use 0 in case of nulls for long or int values. But for things
like timestamps, we need stricter checks. After the performance test, I will
file a jira to ensure we handle this more carefully and return null (Long
object) in case it's actually null. Hope that is fine.
thanks
Vrushali
> [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
> 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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