public abstract class CompressedSizeEstimator extends Object
Modifier and Type | Method and Description |
---|---|
CompressedSizeInfo |
computeCompressedSizeInfos(int k)
Multi threaded version of extracting Compression Size info
|
CompressedSizeInfoColGroup |
estimateCompressedColGroupSize()
Method used for compressing into one type of colGroup
|
EstimationFactors |
estimateCompressedColGroupSize(ABitmap ubm)
Method used to extract the CompressedSizeEstimationFactors from an constructed UncompressedBitmap.
|
abstract CompressedSizeInfoColGroup |
estimateCompressedColGroupSize(int[] colIndexes)
Abstract method for extracting Compressed Size Info of specified columns, together in a single ColGroup
|
public CompressedSizeInfo computeCompressedSizeInfos(int k)
k
- The concurrency degree.public CompressedSizeInfoColGroup estimateCompressedColGroupSize()
public abstract CompressedSizeInfoColGroup estimateCompressedColGroupSize(int[] colIndexes)
colIndexes
- The Colums to group together inside a ColGrouppublic EstimationFactors estimateCompressedColGroupSize(ABitmap ubm)
ubm
- the UncompressedBitmap, either extracted from a sample or from the entier datasetCopyright © 2020 The Apache Software Foundation. All rights reserved.