Interface VmAllocationPolicyMigration

All Superinterfaces:

VmAllocationPolicy

All Known Subinterfaces:

VmAllocationPolicyMigrationDynamicUpperThreshold

All Known Implementing Classes:

VmAllocationPolicyBatchPlacementUnderloadedHosts, VmAllocationPolicyMigrationAbstract, VmAllocationPolicyMigrationBestFitStaticThreshold, VmAllocationPolicyMigrationDynamicUpperThresholdFirstFit, VmAllocationPolicyMigrationFirstFitStaticThreshold, VmAllocationPolicyMigrationStaticThreshold, VmAllocationPolicyMigrationWorstFitStaticThreshold

public interface VmAllocationPolicyMigration
extends VmAllocationPolicy

An interface to be implemented by a VM allocation policy that detects Host under and over CPU utilization.

Since:

CloudSim Plus 1.0

Author:

Anton Beloglazov, Manoel Campos da Silva Filho

Field Summary

Fields

Modifier and Type	Field	Description
static final VmAllocationPolicyMigration	NULL	An attribute that implements the Null Object Design Pattern for VmAllocationPolicyMigration objects.

Fields inherited from interface org.cloudsimplus.allocationpolicies.VmAllocationPolicy

DEF_HOST_COUNT_PARALLEL_SEARCH, LOGGER

Method Summary

Modifier and Type	Method	Description
double	getOverUtilizationThreshold(Host host)	Gets a host CPU utilization threshold to detect over utilization.
double	getUnderUtilizationThreshold()	Gets the percentage of total Host CPU utilization to indicate when a host is under used, so that its VMs can be migrated elsewhere.
VmSelectionPolicy	getVmSelectionPolicy()	Returns the policy that defines how VMs are selected for migration.
boolean	isOverloaded()	Returns true if there is any overloaded Host in the datacenter, false otherwise.
boolean	isOverloaded(Host host)	Checks if a host is currently over-utilized, according to the conditions defined by the Allocation Policy.
boolean	isUnderloaded()	Returns true if there is any underloaded Host in the datacenter, false otherwise.
boolean	isUnderloaded(Host host)	Checks if a host is currently under utilized, according the conditions defined by the Allocation Policy implementation.
default boolean	isUnderOrOverloaded()	Returns true if there is any under or overloaded Host, false otherwise.
void	setUnderUtilizationThreshold(double underUtilizationThreshold)	Sets the percentage of total Host CPU utilization to indicate when a host is under used, so that its VMs can be migrated elsewhere.
VmAllocationPolicy	setVmSelectionPolicy(VmSelectionPolicy vmSelectionPolicy)	Sets the policy that defines how VMs are selected for migration.

Methods inherited from interface org.cloudsimplus.allocationpolicies.VmAllocationPolicy

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

Field Details

NULL

static final VmAllocationPolicyMigration NULL

An attribute that implements the Null Object Design Pattern for VmAllocationPolicyMigration objects.

Method Details

isUnderloaded

boolean isUnderloaded()

Returns true if there is any underloaded Host in the datacenter, false otherwise.

Returns:

true if there is any underloaded Host in the datacenter, false otherwise

isUnderloaded

boolean isUnderloaded(Host host)

Checks if a host is currently under utilized, according the conditions defined by the Allocation Policy implementation.

Parameters:

host - the host to check

Returns:

true if the host is under utilized, false otherwise

isOverloaded

boolean isOverloaded()

Returns true if there is any overloaded Host in the datacenter, false otherwise.

Returns:

true if there is any overloaded Host in the datacenter, false otherwise

isOverloaded

boolean isOverloaded(Host host)

Checks if a host is currently over-utilized, according to the conditions defined by the Allocation Policy.

Parameters:

host - the host to check

Returns:

true if the host is overloaded, false otherwise

getOverUtilizationThreshold

double getOverUtilizationThreshold(Host host)

Gets a host CPU utilization threshold to detect over utilization. Whether it is a static or dynamically defined threshold depends on each allocation policy implementation.

Parameters:

host - the host to get the over utilization threshold

Returns:

the over utilization threshold (a percentage value from 0 to 1)

setVmSelectionPolicy

VmAllocationPolicy setVmSelectionPolicy(VmSelectionPolicy vmSelectionPolicy)

Sets the policy that defines how VMs are selected for migration.

Parameters:

vmSelectionPolicy - the new vm selection policy

Returns:

this VmAllocationPolicy object

getVmSelectionPolicy

VmSelectionPolicy getVmSelectionPolicy()

Returns the policy that defines how VMs are selected for migration.

Returns:

the policy that defines how VMs are selected for migration

getUnderUtilizationThreshold

double getUnderUtilizationThreshold()

Gets the percentage of total Host CPU utilization to indicate when a host is under used, so that its VMs can be migrated elsewhere.

Returns:

the under utilization threshold (a percentage value from 0 to 1)

setUnderUtilizationThreshold

void setUnderUtilizationThreshold(double underUtilizationThreshold)

Sets the percentage of total Host CPU utilization to indicate when a host is under used, so that its VMs can be migrated elsewhere.

Parameters:

underUtilizationThreshold - the under utilization threshold (a percentage value from 0 to 1)

isUnderOrOverloaded

default boolean isUnderOrOverloaded()

Returns true if there is any under or overloaded Host, false otherwise.

Returns:

true if there is any under or overloaded Host, false otherwise