Michael Zhang created SPARK-36234:
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Summary: Consider mapper location and shuffle block size in
OptimizeLocalShuffleReader
Key: SPARK-36234
URL: https://issues.apache.org/jira/browse/SPARK-36234
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.1.2
Reporter: Michael Zhang
This is a follow-up to SPARK-36105 (OptimizeLocalShuffleReader support reading
data of multiple mappers in one task). We should consider using the mapper
locations along with shuffle block size when coalescing mappers (specifically
in events where there are more mappers than there is parallelism.
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