org.apache.sysds.runtime.compress.estim

Class CompressedSizeInfoColGroup

java.lang.Object

org.apache.sysds.runtime.compress.estim.CompressedSizeInfoColGroup

public class CompressedSizeInfoColGroup
extends Object

Information collected about a specific ColGroup's compression size.

Constructor Summary

Constructors

Constructor and Description
CompressedSizeInfoColGroup(EstimationFactors fact, Set<ColGroup.CompressionType> validCompressionTypes)

Method Summary

Modifier and Type	Method and Description
Map<ColGroup.CompressionType,Long>	getAllCompressionSizes()
ColGroup.CompressionType	getBestCompressionType()
long	getCompressionSize(ColGroup.CompressionType ct)
int	getEstCard() Note cardinality is the same as number of distinct values.
int	getEstNnz() Number of offsets, or number of non zero values.
long	getMinSize()

Methods inherited from class java.lang.Object

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

Constructor Detail

CompressedSizeInfoColGroup

public CompressedSizeInfoColGroup(EstimationFactors fact,
                                  Set<ColGroup.CompressionType> validCompressionTypes)

Method Detail

getCompressionSize

public long getCompressionSize(ColGroup.CompressionType ct)

getBestCompressionType

public ColGroup.CompressionType getBestCompressionType()

getAllCompressionSizes

public Map<ColGroup.CompressionType,Long> getAllCompressionSizes()

getMinSize

public long getMinSize()

getEstCard

public int getEstCard()

Note cardinality is the same as number of distinct values.

Returns:

cardinality or number of distinct values.

getEstNnz

public int getEstNnz()

Number of offsets, or number of non zero values.

Returns:

Number of non zeros or number of values.