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From "Zhong Yanghong (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (KYLIN-2728) Introduce a new cuboid scheduler based on cuboid tree rather than static rules
Date Mon, 05 Feb 2018 05:57:02 GMT

     [ https://issues.apache.org/jira/browse/KYLIN-2728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhong Yanghong reopened KYLIN-2728:
-----------------------------------

> Introduce a new cuboid scheduler based on cuboid tree rather than static rules
> ------------------------------------------------------------------------------
>
>                 Key: KYLIN-2728
>                 URL: https://issues.apache.org/jira/browse/KYLIN-2728
>             Project: Kylin
>          Issue Type: Sub-task
>    Affects Versions: v2.1.0
>            Reporter: Zhong Yanghong
>            Assignee: Ma Gang
>            Priority: Major
>             Fix For: v2.2.0
>
>
> Rather than depending on static rules to define a parent-child relationship between cuboids,
a cuboid tree can be constructed for this relationship. In this tree, the root is the base
cuboid. For a cuboid, it may have many legal parent cuboids. We should choose the {color:#f79232}best
parent {color}cuboid as its parent in this tree. Then how to define the best? It's related
two rules as follows:
> * If we know the row count, choose the one with the least row count
> * Otherwise, choose the smallest cuboid
> Based on the cuboid tree, we introduced a new cuboid scheduler called {{TreeCuboidScheduler}}.
And both cube building & query can be based on {{TreeCuboidScheduler}}.



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