org.apache.sysds.runtime.compress.cocode

Class CoCoderFactory

java.lang.Object

org.apache.sysds.runtime.compress.cocode.CoCoderFactory

public class CoCoderFactory
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CoCoderFactory.PartitionerType The Valid coCoding techniques

Constructor Summary

Constructors

Constructor and Description
CoCoderFactory()

Method Summary

Modifier and Type	Method and Description
static CompressedSizeInfo	findCoCodesByPartitioning(CompressedSizeEstimator est, CompressedSizeInfo colInfos, int k, ICostEstimate costEstimator, CompressionSettings cs) Main entry point of CoCode.

Methods inherited from class java.lang.Object

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

Constructor Detail

CoCoderFactory

public CoCoderFactory()

Method Detail

findCoCodesByPartitioning

public static CompressedSizeInfo findCoCodesByPartitioning(CompressedSizeEstimator est,
                                                           CompressedSizeInfo colInfos,
                                                           int k,
                                                           ICostEstimate costEstimator,
                                                           CompressionSettings cs)

Main entry point of CoCode. This package groups together ColGroups across columns, to improve compression further,

Parameters:

est - The size estimator used for estimating ColGroups potential sizes and construct compression info objects

colInfos - The information already gathered on the individual ColGroups of columns.

k - The concurrency degree allowed for this operation.

costEstimator - The Cost estimator to estimate the cost of the compression

cs - The compression settings used in the compression.

Returns:

The estimated (hopefully) best groups of ColGroups.