implicit final class PartitionerAwareUnionRDD2Ops[T] extends AnyVal
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- new PartitionerAwareUnionRDD2Ops(rdd: RDD[T])
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- def union2(other: RDD[T])(implicit tag: ClassTag[T]): RDD[T]
Return the union of this RDD and another one.
Return the union of this RDD and another one. Any identical elements will appear multiple times (use
.distinct()to eliminate them).- Note
this is a custom version to avoid the exponential behavior of Spark when multiple
PartitionerAwareUnionRDDs appear in a large DAG branch.