Package org.apache.flink.optimizer.costs

Class CostEstimator

java.lang.Object

org.apache.flink.optimizer.costs.CostEstimator

Direct Known Subclasses:

DefaultCostEstimator

public abstract class CostEstimator
extends Object

Abstract base class for a cost estimator. Defines cost estimation methods and implements the basic work method that computes the cost of an operator by adding input shipping cost, input local cost, and driver cost.

Constructor Summary

Constructors

Constructor	Description
CostEstimator()

Method Summary

Modifier and Type	Method	Description
abstract void	addArtificialDamCost(EstimateProvider estimates, long bufferSize, Costs costs)
abstract void	addBlockNestedLoopsCosts(EstimateProvider outerSide, EstimateProvider innerSide, long blockSize, Costs costs, int costWeight)
abstract void	addBroadcastCost(EstimateProvider estimates, int replicationFactor, Costs costs)
abstract void	addCachedHybridHashCosts(EstimateProvider buildSide, EstimateProvider probeSide, Costs costs, int costWeight)
abstract void	addFileInputCost(long fileSizeInBytes, Costs costs)
abstract void	addHashPartitioningCost(EstimateProvider estimates, Costs costs)
abstract void	addHybridHashCosts(EstimateProvider buildSide, EstimateProvider probeSide, Costs costs, int costWeight)
abstract void	addLocalMergeCost(EstimateProvider estimates1, EstimateProvider estimates2, Costs costs, int costWeight)
abstract void	addLocalSortCost(EstimateProvider estimates, Costs costs)
abstract void	addRandomPartitioningCost(EstimateProvider estimates, Costs costs)
abstract void	addRangePartitionCost(EstimateProvider estimates, Costs costs)
abstract void	addStreamedNestedLoopsCosts(EstimateProvider outerSide, EstimateProvider innerSide, long bufferSize, Costs costs, int costWeight)
void	costOperator(PlanNode n)	This method computes the cost of an operator.

Methods inherited from class java.lang.Object

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

Constructor Detail

CostEstimator

public CostEstimator()

Method Detail

addRandomPartitioningCost

public abstract void addRandomPartitioningCost(EstimateProvider estimates,
                                               Costs costs)

addHashPartitioningCost

public abstract void addHashPartitioningCost(EstimateProvider estimates,
                                             Costs costs)

addRangePartitionCost

public abstract void addRangePartitionCost(EstimateProvider estimates,
                                           Costs costs)

addBroadcastCost

public abstract void addBroadcastCost(EstimateProvider estimates,
                                      int replicationFactor,
                                      Costs costs)

addFileInputCost

public abstract void addFileInputCost(long fileSizeInBytes,
                                      Costs costs)

addLocalSortCost

public abstract void addLocalSortCost(EstimateProvider estimates,
                                      Costs costs)

addLocalMergeCost

public abstract void addLocalMergeCost(EstimateProvider estimates1,
                                       EstimateProvider estimates2,
                                       Costs costs,
                                       int costWeight)

addHybridHashCosts

public abstract void addHybridHashCosts(EstimateProvider buildSide,
                                        EstimateProvider probeSide,
                                        Costs costs,
                                        int costWeight)

addCachedHybridHashCosts

public abstract void addCachedHybridHashCosts(EstimateProvider buildSide,
                                              EstimateProvider probeSide,
                                              Costs costs,
                                              int costWeight)

addStreamedNestedLoopsCosts

public abstract void addStreamedNestedLoopsCosts(EstimateProvider outerSide,
                                                 EstimateProvider innerSide,
                                                 long bufferSize,
                                                 Costs costs,
                                                 int costWeight)

addBlockNestedLoopsCosts

public abstract void addBlockNestedLoopsCosts(EstimateProvider outerSide,
                                              EstimateProvider innerSide,
                                              long blockSize,
                                              Costs costs,
                                              int costWeight)

addArtificialDamCost

public abstract void addArtificialDamCost(EstimateProvider estimates,
                                          long bufferSize,
                                          Costs costs)

costOperator

public void costOperator(PlanNode n)

This method computes the cost of an operator. The cost is composed of cost for input shipping, locally processing an input, and running the operator.

It requires at least that all inputs are set and have a proper ship strategy set, which is not equal to NONE.

Parameters:

n - The node to compute the costs for.