Package org.cloudsimplus.autoscaling.resources

Class ResourceScalingInstantaneous

java.lang.Object

org.cloudsimplus.autoscaling.resources.ResourceScalingInstantaneous

All Implemented Interfaces:

ResourceScaling

public class ResourceScalingInstantaneous
extends Object
implements ResourceScaling

A ResourceScaling for which the capacity of the resource to be scaled will be instantaneously resized to move the Vm from the under or overload state. This way, the SLA violation time will be reduced.

This scaling type will resize the resource capacity in the following way:

• in underload conditions: it decreases the resource capacity to be equal to the current load of the resource being scaled;
• in overload conditions: it increases the resource capacity to be equal to the current load of the resource being scaled.

Finally it adds an extra amount of resource, defined by the scaling factor, for safety. This extra amount added is to enable the resource usage to grow up to the scaling factor without needing to resize the resource again. If it grows up to the scaling factor, a new up scaling request will be sent.

If the scaling factor for this type of scaling is zero, it means that the scaling object will always resize the resource to the exact amount that is being used.

Since:

CloudSim Plus 1.2.0

Author:

Manoel Campos da Silva Filho

Field Summary

Fields inherited from interface org.cloudsimplus.autoscaling.resources.ResourceScaling

NULL

Constructor Summary

Constructors

Constructor	Description
ResourceScalingInstantaneous()

Method Summary

Modifier and Type	Method	Description
double	getResourceAmountToScale(VerticalVmScaling vmScaling)	Computes the amount of resource to scale up or down, depending if the resource is over or underloaded, respectively.

Methods inherited from class java.lang.Object

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

Constructor Details

ResourceScalingInstantaneous

public ResourceScalingInstantaneous()

Method Details

getResourceAmountToScale

public double getResourceAmountToScale(VerticalVmScaling vmScaling)

Description copied from interface: ResourceScaling

Computes the amount of resource to scale up or down, depending if the resource is over or underloaded, respectively.

Specified by:

getResourceAmountToScale in interface ResourceScaling

Parameters:

vmScaling - the VerticalVmScaling object that is in charge to scale a resource.

Returns: