Nong Li created SPARK-14259:
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Summary: Add config to control maximum number of files when
coalescing partitions
Key: SPARK-14259
URL: https://issues.apache.org/jira/browse/SPARK-14259
Project: Spark
Issue Type: Improvement
Components: SQL
Reporter: Nong Li
Priority: Minor
The FileSourceStrategy currently has a config to control the maximum byte size
of coalesced partitions. It is helpful to also have a config to control the
maximum number of files as even small files have a non-trivial fixed cost. The
current packing can put a lot of small files together which cases straggler
tasks.
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