org.apache.sysds.runtime.compress.cocode

Class ColumnGroupPartitionerBinPacking

java.lang.Object

org.apache.sysds.runtime.compress.cocode.ColumnGroupPartitioner

org.apache.sysds.runtime.compress.cocode.ColumnGroupPartitionerBinPacking

public class ColumnGroupPartitionerBinPacking
extends ColumnGroupPartitioner

Column group partitioning with bin packing heuristic.

Field Summary

Fields

Modifier and Type	Field and Description
static double	BIN_CAPACITY

Constructor Summary

Constructors

Constructor and Description
ColumnGroupPartitionerBinPacking()

Method Summary

Modifier and Type	Method and Description
List<int[]>	partitionColumns(List<Integer> groupCols, HashMap<Integer,PlanningCoCoder.GroupableColInfo> groupColsInfo, CompressionSettings cs) Partitions a list of columns into a list of partitions that contains subsets of columns.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BIN_CAPACITY

public static double BIN_CAPACITY

Constructor Detail

ColumnGroupPartitionerBinPacking

public ColumnGroupPartitionerBinPacking()

Method Detail

partitionColumns

public List<int[]> partitionColumns(List<Integer> groupCols,
                                    HashMap<Integer,PlanningCoCoder.GroupableColInfo> groupColsInfo,
                                    CompressionSettings cs)

Description copied from class: ColumnGroupPartitioner

Partitions a list of columns into a list of partitions that contains subsets of columns. Note that this call must compute a complete and disjoint partitioning.

Specified by:

partitionColumns in class ColumnGroupPartitioner

Parameters:

groupCols - list of columns

groupColsInfo - list of column infos

cs - The Compression settings used for the compression

Returns:

list of partitions (where each partition is a list of columns)