org.cloudbus.cloudsim

Class VmAllocationPolicy

java.lang.Object

org.cloudbus.cloudsim.VmAllocationPolicy

Direct Known Subclasses:

NetworkVmAllocationPolicy, PowerVmAllocationPolicyAbstract, VmAllocationPolicySimple

public abstract class VmAllocationPolicy
extends Object

VmAllocationPolicy is an abstract class that represents the provisioning policy of hosts to virtual machines in a Datacentre. It supports two-stage commit of reservation of hosts: first, we reserve the host and, once commited by the user, it is effectivelly allocated to he/she

Since:

CloudSim Toolkit 1.0

Author:

Rodrigo N. Calheiros, Anton Beloglazov

Constructor Summary

Constructors

Constructor and Description
VmAllocationPolicy(List<? extends Host> list) Allocates a new VmAllocationPolicy object.

Method Summary

Methods

Modifier and Type	Method and Description
abstract boolean	allocateHostForVm(Vm vm) Allocates a host for a given VM.
abstract boolean	allocateHostForVm(Vm vm, Host host) Allocates a specified host for a given VM.
abstract void	deallocateHostForVm(Vm vm) Releases the host used by a VM.
abstract Host	getHost(int vmId, int userId) Get the host that is executing the given VM belonging to the given user.
abstract Host	getHost(Vm vm) Get the host that is executing the given VM belonging to the given user.
<T extends Host> List<T>	getHostList() Gets the host list.
abstract List<Map<String,Object>>	optimizeAllocation(List<? extends Vm> vmList) Optimize allocation of the VMs according to current utilization.
protected void	setHostList(List<? extends Host> hostList) Sets the host list.

Methods inherited from class java.lang.Object

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

Constructor Detail

VmAllocationPolicy

public VmAllocationPolicy(List<? extends Host> list)

Allocates a new VmAllocationPolicy object.

Parameters:

list - Machines available in this Datacentre

Method Detail

allocateHostForVm

public abstract boolean allocateHostForVm(Vm vm)

Allocates a host for a given VM. The host to be allocated is the one that was already reserved.

Parameters:

vm - virtual machine which the host is reserved to

Returns:

$true if the host could be allocated; $false otherwise

allocateHostForVm

public abstract boolean allocateHostForVm(Vm vm,
                        Host host)

Allocates a specified host for a given VM.

Parameters:

vm - virtual machine which the host is reserved to

Returns:

$true if the host could be allocated; $false otherwise

optimizeAllocation

public abstract List<Map<String,Object>> optimizeAllocation(List<? extends Vm> vmList)

Optimize allocation of the VMs according to current utilization.

Parameters:

vmList - the vm list

utilizationBound - the utilization bound

time - the time

Returns:

the array list< hash map< string, object>>

deallocateHostForVm

public abstract void deallocateHostForVm(Vm vm)

Releases the host used by a VM.

Parameters:

vm - the vm

getHost

public abstract Host getHost(Vm vm)

Get the host that is executing the given VM belonging to the given user.

Parameters:

vm - the vm

Returns:

the Host with the given vmID and userID; $null if not found

getHost

public abstract Host getHost(int vmId,
           int userId)

Get the host that is executing the given VM belonging to the given user.

Parameters:

vmId - the vm id

userId - the user id

Returns:

the Host with the given vmID and userID; $null if not found

setHostList

protected void setHostList(List<? extends Host> hostList)

Sets the host list.

Parameters:

hostList - the new host list

getHostList

public <T extends Host> List<T> getHostList()

Gets the host list.

Returns:

the host list