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https://issues.apache.org/jira/browse/KYLIN-2728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhong Yanghong updated KYLIN-2728:
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Description:
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}}.
> 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: v2.2.0
> Reporter: Zhong Yanghong
> Assignee: Zhong Yanghong
>
> 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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