Shaofeng SHI created KYLIN-1385:
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Summary: Enhance FactDistinctColumnsJob to use multiple reducers
Key: KYLIN-1385
URL: https://issues.apache.org/jira/browse/KYLIN-1385
Project: Kylin
Issue Type: Improvement
Components: Job Engine
Affects Versions: v1.2, v2.0
Reporter: Shaofeng SHI
Assignee: Shaofeng SHI
Fix For: v2.1
So far the FactDistinctColumnsJob is using 1 reducer to merge the distinct
values for all dimension columns on fact table. When there are 1 or multiple
ultra high cardinality columns, it couldn't gain concurrency; It should
dispatch the workload to multiple reducers.
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