[SPARK-13926] Automatically use Kryo serializer when shuffling RDDs with simple types - ASF JIRA

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Details

Type: Improvement
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 2.0.0
Component/s: Shuffle, Spark Core
Labels:
None

Target Version/s:

2.0.0

Description

Because ClassTags are available when constructing ShuffledRDD we can use them to automatically use Kryo for shuffle serialization when the RDD's types are guaranteed to be compatible with Kryo (e.g. RDDs whose key, value, and/or combiner types are primitives, arrays of primitives, or strings). This is likely to result in a large performance gain for many RDD API workloads.