org.apache.sysds.runtime.instructions.spark.data

## Class BlockPartitioner

- java.lang.Object
- - org.apache.spark.Partitioner
  - - org.apache.sysds.runtime.instructions.spark.data.BlockPartitioner

- All Implemented Interfaces:
    Serializable

      public class BlockPartitioner
      extends org.apache.spark.Partitioner

  Default partitioner used for all binary block rdd operations in order to enable sufficient local aggregation independent of the aggregation direction (row/col-wise). Especially, on large squared matrices (as common for factorization or graph algorithms), this is crucial for performance.
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `BlockPartitioner(DataCharacteristics mc, int numParts)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `equals(Object obj)`
    `int` | `getPartition(Object arg0)`
    `int` | `hashCode()`
    `int` | `numPartitions()`

    - ### Methods inherited from class org.apache.spark.Partitioner

      `defaultPartitioner`

    - ### Methods inherited from class java.lang.Object

      `getClass, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### BlockPartitioner

          public BlockPartitioner(DataCharacteristics mc,
                                  int numParts)

  - ### Method Detail

    - #### getPartition

          public int getPartition(Object arg0)

      Specified by:
        `getPartition` in class `org.apache.spark.Partitioner`

    - #### numPartitions

          public int numPartitions()

      Specified by:
        `numPartitions` in class `org.apache.spark.Partitioner`

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `Object`

    - #### equals

          public boolean equals(Object obj)

      Overrides:
        `equals` in class `Object`

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