org.apache.spark

NarrowDependency

abstract class NarrowDependency[T] extends Dependency[T]

Base class for dependencies where each partition of the parent RDD is used by at most one partition of the child RDD. Narrow dependencies allow for pipelined execution.

Linear Supertypes
Dependency[T], Serializable, Serializable, AnyRef, Any
Known Subclasses
OneToOneDependency, PruneDependency, RangeDependency
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Instance Constructors

  1. new NarrowDependency(rdd: RDD[T])

Abstract Value Members

  1. abstract def getParents(partitionId: Int): Seq[Int]

    Get the parent partitions for a child partition.

    Get the parent partitions for a child partition.

    partitionId

    a partition of the child RDD

    returns

    the partitions of the parent RDD that the child partition depends upon

Concrete Value Members

  1. final def !=(arg0: AnyRef): Boolean

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  2. final def !=(arg0: Any): Boolean

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  3. final def ##(): Int

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  4. final def ==(arg0: AnyRef): Boolean

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  5. final def ==(arg0: Any): Boolean

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  6. final def asInstanceOf[T0]: T0

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  7. def clone(): AnyRef

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    protected[java.lang]
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    @throws( ... )

  8. final def eq(arg0: AnyRef): Boolean

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  9. def equals(arg0: Any): Boolean

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  10. def finalize(): Unit

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    protected[java.lang]
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    @throws( classOf[java.lang.Throwable] )

  11. final def getClass(): Class[_]

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  12. def hashCode(): Int

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  13. final def isInstanceOf[T0]: Boolean

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  14. final def ne(arg0: AnyRef): Boolean

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  15. final def notify(): Unit

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  16. final def notifyAll(): Unit

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  17. final def synchronized[T0](arg0: ⇒ T0): T0

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  18. def toString(): String

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  19. final def wait(): Unit

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    @throws( ... )

  20. final def wait(arg0: Long, arg1: Int): Unit

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  21. final def wait(arg0: Long): Unit

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Inherited from Dependency[T]

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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