Xin Hao created HIVE-13634:
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Summary: Hive-on-Spark performed worse than Hive-on-MR, for
queries with external scripts
Key: HIVE-13634
URL: https://issues.apache.org/jira/browse/HIVE-13634
Project: Hive
Issue Type: Bug
Reporter: Xin Hao
Hive-on-Spark performed worse than Hive-on-MR, for queries with external
scripts.
For TPCx-BB Q2/Q3/Q4, they are Python Streaming related cases and will call
external scripts to handle reduce tasks. We found that for these 3 queries
Hive-on-Spark shows lower performance than Hive-on-MR when processing reduce
tasks with external (Python) scripts. So ‘Improve HoS performance for queries
with external scripts’ seems a performance optimization opportunity.
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