Package org.cloudbus.cloudsim.allocationpolicies.migration

Class VmAllocationPolicyMigrationStaticThreshold

java.lang.Object

org.cloudbus.cloudsim.allocationpolicies.VmAllocationPolicyAbstract

org.cloudbus.cloudsim.allocationpolicies.migration.VmAllocationPolicyMigrationAbstract

org.cloudbus.cloudsim.allocationpolicies.migration.VmAllocationPolicyMigrationStaticThreshold

All Implemented Interfaces:

VmAllocationPolicyMigration, VmAllocationPolicy

Direct Known Subclasses:

VmAllocationPolicyMigrationBestFitStaticThreshold, VmAllocationPolicyMigrationWorstFitStaticThreshold

public class VmAllocationPolicyMigrationStaticThreshold
extends VmAllocationPolicyMigrationAbstract

A VM allocation policy that uses a static CPU utilization threshold to detect host over utilization. It's a First Fit policy which selects the first Host found with most efficient power usage to place a given VM.

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

Modifier and Type	Field	Description
static final double	DEF_OVER_UTILIZATION_THRESHOLD

Fields inherited from class org.cloudbus.cloudsim.allocationpolicies.migration.VmAllocationPolicyMigrationAbstract

DEF_UNDERLOAD_THRESHOLD

Fields inherited from interface org.cloudbus.cloudsim.allocationpolicies.VmAllocationPolicy

DEF_HOST_COUNT_PARALLEL_SEARCH, LOGGER, NULL

Fields inherited from interface org.cloudbus.cloudsim.allocationpolicies.migration.VmAllocationPolicyMigration

NULL

Constructor Summary

Constructors

Constructor	Description
VmAllocationPolicyMigrationStaticThreshold(VmSelectionPolicy vmSelectionPolicy)	Creates a VmAllocationPolicyMigrationStaticThreshold.
VmAllocationPolicyMigrationStaticThreshold(VmSelectionPolicy vmSelectionPolicy, double overUtilizationThreshold)	Creates a VmAllocationPolicyMigrationStaticThreshold.
VmAllocationPolicyMigrationStaticThreshold(VmSelectionPolicy vmSelectionPolicy, double overUtilizationThreshold, BiFunction<VmAllocationPolicy,Vm,Optional<Host>> findHostForVmFunction)	Creates a VmAllocationPolicyMigrationStaticThreshold, changing the Function to select a Host for a Vm.

Method Summary

Modifier and Type	Method	Description
double	getOverUtilizationThreshold(Host host)	Gets the static host CPU utilization threshold to detect over utilization.
final void	setOverUtilizationThreshold(double overUtilizationThreshold)	Sets the static host CPU utilization threshold to detect over utilization.

Methods inherited from class org.cloudbus.cloudsim.allocationpolicies.migration.VmAllocationPolicyMigrationAbstract

areHostsOverloaded, areHostsUnderloaded, defaultFindHostForVm, findHostForVmInternal, getMaxUtilizationAfterAllocation, getOptimizedAllocationMap, getPowerAfterAllocation, getPowerDifferenceAfterAllocation, getSwitchedOffHosts, getUnderUtilizationThreshold, getUtilizationOfCpuMips, getVmSelectionPolicy, getVmsToMigrateFromUnderUtilizedHost, isHostOverloaded, isHostUnderloaded, isVmMigrationSupported, setUnderUtilizationThreshold, setVmSelectionPolicy

Methods inherited from class org.cloudbus.cloudsim.allocationpolicies.VmAllocationPolicyAbstract

allocateHostForVm, allocateHostForVm, allocateHostForVm, deallocateHostForVm, findHostForVm, getDatacenter, getHostCountForParallelSearch, getHostList, scaleVmVertically, setDatacenter, setFindHostForVmFunction, setHostCountForParallelSearch

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.cloudbus.cloudsim.allocationpolicies.VmAllocationPolicy

allocateHostForVm, allocateHostForVm, allocateHostForVm, deallocateHostForVm, findHostForVm, getDatacenter, getHostCountForParallelSearch, getHostList, isParallelHostSearchEnabled, scaleVmVertically, setDatacenter, setFindHostForVmFunction, setHostCountForParallelSearch

Methods inherited from interface org.cloudbus.cloudsim.allocationpolicies.migration.VmAllocationPolicyMigration

areHostsUnderOrOverloaded

Field Details

DEF_OVER_UTILIZATION_THRESHOLD

public static final double DEF_OVER_UTILIZATION_THRESHOLD

See Also:

• Constant Field Values

Constructor Details

VmAllocationPolicyMigrationStaticThreshold

public VmAllocationPolicyMigrationStaticThreshold(VmSelectionPolicy vmSelectionPolicy)

Creates a VmAllocationPolicyMigrationStaticThreshold. It uses a default over utilization threshold and a default under utilization threshold.

Parameters:

vmSelectionPolicy - the policy that defines how VMs are selected for migration

See Also:

• VmAllocationPolicyMigrationAbstract.setUnderUtilizationThreshold(double)
• setOverUtilizationThreshold(double)

VmAllocationPolicyMigrationStaticThreshold

public VmAllocationPolicyMigrationStaticThreshold(VmSelectionPolicy vmSelectionPolicy,
 double overUtilizationThreshold)

Creates a VmAllocationPolicyMigrationStaticThreshold.

Parameters:

vmSelectionPolicy - the policy that defines how VMs are selected for migration

overUtilizationThreshold - the over utilization threshold

VmAllocationPolicyMigrationStaticThreshold

public VmAllocationPolicyMigrationStaticThreshold(VmSelectionPolicy vmSelectionPolicy,
 double overUtilizationThreshold,
 BiFunction<VmAllocationPolicy,Vm,Optional<Host>> findHostForVmFunction)

Creates a VmAllocationPolicyMigrationStaticThreshold, changing the Function to select a Host for a Vm.

Parameters:

vmSelectionPolicy - the policy that defines how VMs are selected for migration

overUtilizationThreshold - the over utilization threshold

findHostForVmFunction - a Function to select a Host for a given Vm. Passing null makes the Function to be set as the default VmAllocationPolicyAbstract.findHostForVm(Vm).

See Also:

• VmAllocationPolicy.setFindHostForVmFunction(java.util.function.BiFunction)

Method Details

setOverUtilizationThreshold

public final void setOverUtilizationThreshold(double overUtilizationThreshold)

Sets the static host CPU utilization threshold to detect over utilization.

Parameters:

overUtilizationThreshold - the overUtilizationThreshold to set

getOverUtilizationThreshold

public double getOverUtilizationThreshold(Host host)

Gets the static host CPU utilization threshold to detect over utilization. It is a percentage value from 0 to 1 that can be changed when creating an instance of the class.

This implementation always returns the same over utilization threshold for any given host

Parameters:

host - the host to get the over utilization threshold

Returns:

the over utilization threshold (that is the same for any given host)