Package org.cloudbus.cloudsim.selectionpolicies

Class VmSelectionPolicyRandomSelection

java.lang.Object

org.cloudbus.cloudsim.selectionpolicies.VmSelectionPolicyRandomSelection

All Implemented Interfaces:

VmSelectionPolicy

public class VmSelectionPolicyRandomSelection
extends Object
implements VmSelectionPolicy

A VM selection policy that randomly select VMs to migrate from a host. It uses a uniform Pseudo Random Number Generator (PRNG) as default to select VMs.
If you are using any algorithms, policies or workload included in the power package please cite the following paper:

• Anton Beloglazov, and Rajkumar Buyya, "Optimal Online Deterministic Algorithms and Adaptive Heuristics for Energy and Performance Efficient Dynamic Consolidation of Virtual Machines in Cloud Data Centers", Concurrency and Computation: Practice and Experience (CCPE), Volume 24, Issue 13, Pages: 1397-1420, John Wiley and Sons, Ltd, New York, USA, 2012

Since:

CloudSim Toolkit 3.0

Author:

Anton Beloglazov

Field Summary

Fields inherited from interface org.cloudbus.cloudsim.selectionpolicies.VmSelectionPolicy

NULL

Constructor Summary

Constructors

Constructor	Description
VmSelectionPolicyRandomSelection()	Creates a PowerVmSelectionPolicyRandomSelection using a uniform Pseudo Random Number Generator (PRNG) as default to select VMs to migrate.
VmSelectionPolicyRandomSelection(ContinuousDistribution rand)	Creates a PowerVmSelectionPolicyRandomSelection using a given Pseudo Random Number Generator (PRNG) to select VMs to migrate.

Method Summary

Modifier and Type	Method	Description
Vm	getVmToMigrate(Host host)	Gets a VM to migrate from a given host.

Methods inherited from class java.lang.Object

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

Constructor Details

VmSelectionPolicyRandomSelection

public VmSelectionPolicyRandomSelection()

Creates a PowerVmSelectionPolicyRandomSelection using a uniform Pseudo Random Number Generator (PRNG) as default to select VMs to migrate.

VmSelectionPolicyRandomSelection

public VmSelectionPolicyRandomSelection(ContinuousDistribution rand)

Creates a PowerVmSelectionPolicyRandomSelection using a given Pseudo Random Number Generator (PRNG) to select VMs to migrate.

Parameters:

rand - a Pseudo Random Number Generator (PRNG) to randomly select VMs to migrate.

Method Details

getVmToMigrate

public Vm getVmToMigrate(Host host)

Description copied from interface: VmSelectionPolicy

Gets a VM to migrate from a given host.

Specified by:

getVmToMigrate in interface VmSelectionPolicy

Parameters:

host - the host to get a Vm to migrate from

Returns:

the vm to migrate or Vm.NULL if there is not Vm to migrate