Package org.apache.sysds.runtime.compress.cocode

Interface CoCoderFactory

public interface CoCoderFactory

Nested Class Summary

Nested Classes

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

Field Summary

Fields

Modifier and Type	Field	Description
static org.apache.commons.logging.Log	LOG

Method Summary

Static Methods

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

Field Detail

LOG

static final org.apache.commons.logging.Log LOG

Method Detail

findCoCodesByPartitioning

static CompressedSizeInfo findCoCodesByPartitioning(AComEst est,
                                                    CompressedSizeInfo colInfos,
                                                    int k,
                                                    ACostEstimate 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.