liuxian created SPARK-25166:
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Summary: Reduce the number of write operations for shuffle write.
Key: SPARK-25166
URL: https://issues.apache.org/jira/browse/SPARK-25166
Project: Spark
Issue Type: Improvement
Components: Shuffle
Affects Versions: 2.4.0
Reporter: liuxian
Currently, each record will be write to a buffer , which increases the number
of copies.
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