BlockPartitioner (Apache SystemDS 3.0.0 API)

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

All Implemented Interfaces:

Serializable, scala.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 Description

BlockPartitioner(DataCharacteristics mc, int numParts)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	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