See: Description
Class  Description 

ReservoirSample 
Performs a simple random sample using an inmemory reservoir to produce
a uniformly random sample of a given size.

ReservoirSample.Final  
ReservoirSample.Initial  
ReservoirSample.Intermediate  
SampleByKey 
Provides a way of sampling tuples based on certain fields.

SimpleRandomSample 
Scalable simple random sampling (ScaSRS).

SimpleRandomSample.Final  
SimpleRandomSample.Initial  
SimpleRandomSample.Intermediate  
SimpleRandomSampleWithReplacementElect 
Select the candidate with the smallest score for each position from the candidates
proposed by
SimpleRandomSampleWithReplacementVote . 
SimpleRandomSampleWithReplacementElect.Final  
SimpleRandomSampleWithReplacementElect.Initial  
SimpleRandomSampleWithReplacementElect.Intermediate  
SimpleRandomSampleWithReplacementVote 
Scalable simple random sampling with replacement (ScaSRSWR).

WeightedReservoirSample 
Performs a weighted random sample using an inmemory reservoir to produce
a weighted random sample of a given size based on the ARes algorithm described in
paper.

WeightedReservoirSample.Final  
WeightedReservoirSample.Initial  
WeightedReservoirSample.Intermediate  
WeightedSample 
Performs weighted bernoulli sampling on a bag.
