hongbin ma created KYLIN-1482:
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Summary: [UMBRELLA] optimize the cuboids to be computed
Key: KYLIN-1482
URL: https://issues.apache.org/jira/browse/KYLIN-1482
Project: Kylin
Issue Type: Task
Affects Versions: v2.1
Reporter: hongbin ma
Assignee: hongbin ma
As known to many the number of cuboids is exponential to the number of
dimensions. Currently in the latest dev branch, Kylin adopt a well designed
pruning scheme called "New Aggregation Group"
(http://kylin.apache.org/blog/2016/02/18/new-aggregation-group/) that allows
user to specify relationships between dimensions for cuboid pruning. The
rule-based approach is simple and effective in many situations.
However the rule-based approach also has its limitations: It will fail to
capture potential prunings when the cube designer does not fully understand how
the cube will be used, or the nature of the relationship between parent/child
cuboid. In this case, we need to provide more flexible tools for cube designer
to optimize which cuboids to be computed and which not to.
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