Class

org.apache.spark

HashPartitioner

Related Doc: package spark

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class HashPartitioner extends Partitioner

A org.apache.spark.Partitioner that implements hash-based partitioning using Java's Object.hashCode.

Java arrays have hashCodes that are based on the arrays' identities rather than their contents, so attempting to partition an RDD[Array[_]] or RDD[(Array[_], _)] using a HashPartitioner will produce an unexpected or incorrect result.

Source
Partitioner.scala
Linear Supertypes
Partitioner, Serializable, Serializable, AnyRef, Any
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Inherited
  1. HashPartitioner
  2. Partitioner
  3. Serializable
  4. Serializable
  5. AnyRef
  6. Any
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Visibility
  1. Public
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Instance Constructors

  1. new HashPartitioner(partitions: Int)

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Value Members

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

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    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  5. def clone(): AnyRef

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

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    Definition Classes
    AnyRef
  7. def equals(other: Any): Boolean

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    Definition Classes
    HashPartitioner → AnyRef → Any
  8. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  9. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any
  10. def getPartition(key: Any): Int

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    Definition Classes
    HashPartitionerPartitioner
  11. def hashCode(): Int

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    Definition Classes
    HashPartitioner → AnyRef → Any
  12. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  13. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  14. final def notify(): Unit

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    Definition Classes
    AnyRef
  15. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
  16. def numPartitions: Int

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

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    Definition Classes
    AnyRef
  18. def toString(): String

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    Definition Classes
    AnyRef → Any
  19. final def wait(): Unit

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    AnyRef
    Annotations
    @throws( ... )
  20. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  21. final def wait(arg0: Long): Unit

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    AnyRef
    Annotations
    @throws( ... )

Inherited from Partitioner

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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