Class Shuffle

java.lang.Object

io.nosqlbench.virtdata.library.basics.core.lfsrs.MetaShift.Func

io.nosqlbench.virtdata.library.basics.shared.from_long.to_long.Shuffle

All Implemented Interfaces:

LongUnaryOperator

public class Shuffle
extends MetaShift.Func

This function provides a low-overhead shuffling effect without loading elements into memory. It uses a bundled dataset of pre-computed Galois LFSR shift register configurations, along with a down-sampling method to provide amortized virtual shuffling with minimal memory usage. Essentially, this guarantees that every value in the specified range will be seen at least once before the cycle repeats. However, since the order of traversal of these values is dependent on the LFSR configuration, some orders will appear much more random than others depending on where you are in the traversal cycle. This function *does* yield values that are deterministic.

Field Summary

Fields inherited from class io.nosqlbench.virtdata.library.basics.core.lfsrs.MetaShift.Func

config, feedback, periodModulo

Constructor Summary

Constructors

Constructor	Description
Shuffle(long min, long maxPlusOne)
Shuffle(long min, long maxPlusOne, int bankSelector)

Method Summary

Modifier and Type	Method	Description
long	applyAsLong(long register)

Methods inherited from class io.nosqlbench.virtdata.library.basics.core.lfsrs.MetaShift.Func

toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.function.LongUnaryOperator

andThen, compose

Constructor Details

Shuffle

public Shuffle(long min,
 long maxPlusOne)

Shuffle

public Shuffle(long min,
 long maxPlusOne,
 int bankSelector)

Method Details

applyAsLong

public long applyAsLong(long register)

Specified by:

applyAsLong in interface LongUnaryOperator

Overrides:

applyAsLong in class MetaShift.Func