Class

org.apache.spark

NarrowDependency

Related Doc: package spark

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abstract class NarrowDependency[T] extends Dependency[T]

:: DeveloperApi :: Base class for dependencies where each partition of the child RDD depends on a small number of partitions of the parent RDD. Narrow dependencies allow for pipelined execution.

Annotations
@DeveloperApi()
Source
Dependency.scala
Linear Supertypes
Dependency[T], Serializable, Serializable, AnyRef, Any
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  1. NarrowDependency
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Instance Constructors

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

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Abstract Value Members

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

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    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: Any): Boolean

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  2. final def ##(): Int

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

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  4. final def asInstanceOf[T0]: T0

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  5. def clone(): AnyRef

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    protected[java.lang]
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    @throws( ... )
  6. final def eq(arg0: AnyRef): Boolean

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  7. def equals(arg0: Any): Boolean

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  8. def finalize(): Unit

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    protected[java.lang]
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    @throws( classOf[java.lang.Throwable] )
  9. final def getClass(): Class[_]

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  10. def hashCode(): Int

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  11. final def isInstanceOf[T0]: Boolean

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

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  13. final def notify(): Unit

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  14. final def notifyAll(): Unit

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  15. def rdd: RDD[T]

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    Definition Classes
    NarrowDependencyDependency
  16. final def synchronized[T0](arg0: ⇒ T0): T0

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  17. def toString(): String

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  18. final def wait(): Unit

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    @throws( ... )
  19. final def wait(arg0: Long, arg1: Int): Unit

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    @throws( ... )
  20. 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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