configuration

Class XVM

java.lang.Object

configuration.XVM

public class XVM
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
XVM(XHost host, java.lang.String name, int nbCores, int ramsize, int netBW, java.lang.String diskPath, int diskSize, int migNetBW, int dpIntensity) Construcor

Method Summary

Modifier and Type	Method and Description
double	getCoreNumber()
double	getCPUDemand()
Daemon	getDaemon()
double	getLoad()
XHost	getLocation()
int	getMemSize()
java.lang.String	getName()
int	getNbOfLoadChanges()
int	getNbOfMigrations()
long	getNetBW()
boolean	isMigrating()
boolean	isRunning()
void	migrate(XHost host) Migrate a VM from one XHost to another one.
int	resume() TODO Adrien - improve implementation & documentation
void	setLoad(double expectedLoad) Change the load of the VM, please remind that the load of the VM is set to 0 at its beginning.
void	shutdown()
void	start() Override start method in order to start the daemon at the same time that should run inside the VM.
int	suspend() TODO Adrien - Error management & documentation
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

XVM

public XVM(XHost host,
           java.lang.String name,
           int nbCores,
           int ramsize,
           int netBW,
           java.lang.String diskPath,
           int diskSize,
           int migNetBW,
           int dpIntensity)

Construcor

Parameters:

host - the XHost (i.e. the PM where the VM is currently running)

name - the name of the vm (as it is listed by virsh list for instance)

nbCores - the nbCores of the VM, please note that right now the injector is able to correctly manage only one core VM.

ramsize - the size of the RAM (rigid parameter, once it has been assigned this value should not evolve.

netBW - the bandwidth of the NIC (expressed in MBytes per second, for instance for a 1Gb/s ethernet NIC, you should mention 125 MBytes.

diskPath - the path to the disk image (not used for the moment)

diskSize - the size of the disk image (not used for the moment)

migNetBW - the network bandwidth available for performing the migration (i.e. rigid value, this is the maximum value that the migration can expect). In the first version of KVM, the bandwidth for the migration was limited to 32MBytes. Although now, kvm uses the whole bandwidth that can be offered by the Host NIC, users can define a dedicated value for one VM y using the (virsh migrate_set_speed command.

dpIntensity - the dirty page intensity, i.e. the refresh rate of the memory as described in the cloudcom 2013 paper (Adding a Live Migration Model into SimGrid: One More Step Toward the Simulation of Infrastructure-as-a-Service Concerns) The parameter is expressed has a percentage of the network bandwidth.

Method Detail

getName

public java.lang.String getName()

Returns:

the name of the VM

getCoreNumber

public double getCoreNumber()

Returns:

the number of core of the VM

setLoad

public void setLoad(double expectedLoad)

Change the load of the VM, please remind that the load of the VM is set to 0 at its beginning. TODO, check whether it makes sense to set the load to a minimal load.

Parameters:

expectedLoad - expressed as a percentage (i.e. between 0 and 100)

getLoad

public double getLoad()

getDaemon

public Daemon getDaemon()

Returns:

the daemon process (i.e MSG Process) in charge of simulating the load of the VM

getNbOfLoadChanges

public int getNbOfLoadChanges()

Returns:

the number of times the load has been changed since the begining of the simulation

getNbOfMigrations

public int getNbOfMigrations()

Returns:

the number of times the VM has been migrated since the begining of the simulation

start

public void start()

Override start method in order to start the daemon at the same time that should run inside the VM.

shutdown

public void shutdown()

isRunning

public boolean isRunning()

migrate

public void migrate(XHost host)
             throws org.simgrid.msg.HostFailureException,
                    DoubleMigrationException

Migrate a VM from one XHost to another one.

Parameters:

host - the host where to migrate the VM

Throws:

org.simgrid.msg.HostFailureException

DoubleMigrationException

suspend

public int suspend()

TODO Adrien - Error management & documentation

Returns:

0 if success, 1 if should be postponed, -1 if failure, -2 if already suspended

resume

public int resume()

TODO Adrien - improve implementation & documentation

Returns:

0 if success, -1 if failure, 1 if already running

getMemSize

public int getMemSize()

Returns:

the size of the RAM in MBytes

isMigrating

public boolean isMigrating()

Returns:

the size of the RAM in MBytes

getCPUDemand

public double getCPUDemand()

Returns:

the current load of the VM

getLocation

public XHost getLocation()

Returns:

the current location of the VM (i.e. its XHost)

getNetBW

public long getNetBW()

Returns:

the load of the network

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object