java - 将 Cloudlet 动态添加到已运行的同一 VM(在 CloudSim.startSimulation() 之后)

Question

在 CloudSimExample7 ,

package org.cloudbus.cloudsim.examples;

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.LinkedList;
import java.util.List;

import org.cloudbus.cloudsim.Cloudlet;
import org.cloudbus.cloudsim.CloudletSchedulerTimeShared;
import org.cloudbus.cloudsim.Datacenter;
import org.cloudbus.cloudsim.DatacenterBroker;
import org.cloudbus.cloudsim.DatacenterCharacteristics;
import org.cloudbus.cloudsim.Host;
import org.cloudbus.cloudsim.Log;
import org.cloudbus.cloudsim.Pe;
import org.cloudbus.cloudsim.Storage;
import org.cloudbus.cloudsim.UtilizationModel;
import org.cloudbus.cloudsim.UtilizationModelFull;
import org.cloudbus.cloudsim.Vm;
import org.cloudbus.cloudsim.VmAllocationPolicySimple;
import org.cloudbus.cloudsim.VmSchedulerTimeShared;
import org.cloudbus.cloudsim.core.CloudSim;
import org.cloudbus.cloudsim.provisioners.BwProvisionerSimple;
import org.cloudbus.cloudsim.provisioners.PeProvisionerSimple;
import org.cloudbus.cloudsim.provisioners.RamProvisionerSimple;

/**
* An example showing how to pause and resume the simulation,
* and create simulation entities (a DatacenterBroker in this example)
* dynamically.
*/
public class CloudSimExample7 {

/** The cloudlet list. */
private static List<Cloudlet> cloudletList;

/** The vmlist. */
private static List<Vm> vmlist;

private static List<Vm> createVM(int userId, int vms, int idShift) {
    //Creates a container to store VMs. This list is passed to the broker later
    LinkedList<Vm> list = new LinkedList<Vm>();

    //VM Parameters
    long size = 10000; //image size (MB)
    int ram = 512; //vm memory (MB)
    int mips = 250;
    long bw = 1000;
    int pesNumber = 1; //number of cpus
    String vmm = "Xen"; //VMM name

    //create VMs
    Vm[] vm = new Vm[vms];

    for(int i=0;i<vms;i++){
        vm[i] = new Vm(idShift + i, userId, mips, pesNumber, ram, bw, size, vmm, new CloudletSchedulerTimeShared());
        list.add(vm[i]);
    }

    return list;
}


private static List<Cloudlet> createCloudlet(int userId, int cloudlets, int idShift){
    // Creates a container to store Cloudlets
    LinkedList<Cloudlet> list = new LinkedList<Cloudlet>();

    //cloudlet parameters
    long length = 40000;
    long fileSize = 300;
    long outputSize = 300;
    int pesNumber = 1;
    UtilizationModel utilizationModel = new UtilizationModelFull();

    Cloudlet[] cloudlet = new Cloudlet[cloudlets];

    for(int i=0;i<cloudlets;i++){
        cloudlet[i] = new Cloudlet(idShift + i, length, pesNumber, fileSize, outputSize, utilizationModel, utilizationModel, utilizationModel);
        // setting the owner of these Cloudlets
        cloudlet[i].setUserId(userId);
        list.add(cloudlet[i]);
    }

    return list;
}


////////////////////////// STATIC METHODS ///////////////////////

/**
 * Creates main() to run this example
 */
public static void main(String[] args) {
    Log.printLine("Starting CloudSimExample7...");

    try {
        // First step: Initialize the CloudSim package. It should be called
        // before creating any entities.
        int num_user = 2;   // number of grid users
        Calendar calendar = Calendar.getInstance();
        boolean trace_flag = false;  // mean trace events

        // Initialize the CloudSim library
        CloudSim.init(num_user, calendar, trace_flag);

        // Second step: Create Datacenters
        //Datacenters are the resource providers in CloudSim. We need at list one of them to run a CloudSim simulation
        @SuppressWarnings("unused")
        Datacenter datacenter0 = createDatacenter("Datacenter_0");
        @SuppressWarnings("unused")
        Datacenter datacenter1 = createDatacenter("Datacenter_1");

        //Third step: Create Broker
        DatacenterBroker broker = createBroker("Broker_0");
        int brokerId = broker.getId();

        //Fourth step: Create VMs and Cloudlets and send them to broker
        vmlist = createVM(brokerId, 5, 0); //creating 5 vms
        cloudletList = createCloudlet(brokerId, 10, 0); // creating 10 cloudlets

        broker.submitVmList(vmlist);
        broker.submitCloudletList(cloudletList);

        // A thread that will create a new broker at 200 clock time
        Runnable monitor = new Runnable() {
            @Override
            public void run() {
                CloudSim.pauseSimulation(200);
                while (true) {
                    if (CloudSim.isPaused()) {
                        break;
                    }
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }

                Log.printLine("\n\n\n" + CloudSim.clock() + ": The simulation is paused for 5 sec \n\n");

                try {
                    Thread.sleep(5000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

                **DatacenterBroker broker = createBroker("Broker_1");
                int brokerId = broker.getId();
                //Create VMs and Cloudlets and send them to broker
                vmlist = createVM(brokerId, 5, 100); //creating 5 vms
                cloudletList = createCloudlet(brokerId, 10, 100); // creating 10 cloudlets
                broker.submitVmList(vmlist);
                broker.submitCloudletList(cloudletList);
                CloudSim.resumeSimulation();**
            }
        };

        new Thread(monitor).start();
        Thread.sleep(1000);

        // Fifth step: Starts the simulation
        CloudSim.startSimulation();

        // Final step: Print results when simulation is over
        List<Cloudlet> newList = broker.getCloudletReceivedList();

        CloudSim.stopSimulation();

        printCloudletList(newList);

        Log.printLine("CloudSimExample7 finished!");
    }
    catch (Exception e)
    {
        e.printStackTrace();
        Log.printLine("The simulation has been terminated due to an unexpected error");
    }
}

private static Datacenter createDatacenter(String name){

    // Here are the steps needed to create a PowerDatacenter:
    // 1. We need to create a list to store one or more
    //    Machines
    List<Host> hostList = new ArrayList<Host>();

    // 2. A Machine contains one or more PEs or CPUs/Cores. Therefore, should
    //    create a list to store these PEs before creating
    //    a Machine.
    List<Pe> peList1 = new ArrayList<Pe>();

    int mips = 1000;

    // 3. Create PEs and add these into the list.
    //for a quad-core machine, a list of 4 PEs is required:
    peList1.add(new Pe(0, new PeProvisionerSimple(mips))); // need to store Pe id and MIPS Rating
    peList1.add(new Pe(1, new PeProvisionerSimple(mips)));
    peList1.add(new Pe(2, new PeProvisionerSimple(mips)));
    peList1.add(new Pe(3, new PeProvisionerSimple(mips)));

    //Another list, for a dual-core machine
    List<Pe> peList2 = new ArrayList<Pe>();

    peList2.add(new Pe(0, new PeProvisionerSimple(mips)));
    peList2.add(new Pe(1, new PeProvisionerSimple(mips)));

    //4. Create Hosts with its id and list of PEs and add them to the list of machines
    int hostId=0;
    int ram = 16384; //host memory (MB)
    long storage = 1000000; //host storage
    int bw = 10000;

    hostList.add(
            new Host(
                hostId,
                new RamProvisionerSimple(ram),
                new BwProvisionerSimple(bw),
                storage,
                peList1,
                new VmSchedulerTimeShared(peList1)
            )
        ); // This is our first machine

    hostId++;

    hostList.add(
            new Host(
                hostId,
                new RamProvisionerSimple(ram),
                new BwProvisionerSimple(bw),
                storage,
                peList2,
                new VmSchedulerTimeShared(peList2)
            )
        ); // Second machine

    // 5. Create a DatacenterCharacteristics object that stores the
    //    properties of a data center: architecture, OS, list of
    //    Machines, allocation policy: time- or space-shared, time zone
    //    and its price (G$/Pe time unit).
    String arch = "x86";      // system architecture
    String os = "Linux";          // operating system
    String vmm = "Xen";
    double time_zone = 10.0;         // time zone this resource located
    double cost = 3.0;              // the cost of using processing in this resource
    double costPerMem = 0.05;       // the cost of using memory in this resource
    double costPerStorage = 0.1;    // the cost of using storage in this resource
    double costPerBw = 0.1;         // the cost of using bw in this resource
    LinkedList<Storage> storageList = new LinkedList<Storage>();    //we are not adding SAN devices by now

    DatacenterCharacteristics characteristics = new DatacenterCharacteristics(
            arch, os, vmm, hostList, time_zone, cost, costPerMem, costPerStorage, costPerBw);


    // 6. Finally, we need to create a PowerDatacenter object.
    Datacenter datacenter = null;
    try {
        datacenter = new Datacenter(name, characteristics, new VmAllocationPolicySimple(hostList), storageList, 0);
    } catch (Exception e) {
        e.printStackTrace();
    }

    return datacenter;
}

//We strongly encourage users to develop their own broker policies, to submit vms and cloudlets according
//to the specific rules of the simulated scenario
private static DatacenterBroker createBroker(String name){

    DatacenterBroker broker = null;
    try {
        broker = new DatacenterBroker(name);
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
    return broker;
}

/**
 * Prints the Cloudlet objects
 * @param list  list of Cloudlets
 */
private static void printCloudletList(List<Cloudlet> list) {
    int size = list.size();
    Cloudlet cloudlet;

    String indent = "    ";
    Log.printLine();
    Log.printLine("========== OUTPUT ==========");
    Log.printLine("Cloudlet ID" + indent + "STATUS" + indent +
            "Data center ID" + indent + "VM ID" + indent + indent + "Time" + indent + "Start Time" + indent + "Finish Time");

    DecimalFormat dft = new DecimalFormat("###.##");
    for (int i = 0; i < size; i++) {
        cloudlet = list.get(i);
        Log.print(indent + cloudlet.getCloudletId() + indent + indent);

        if (cloudlet.getCloudletStatus() == Cloudlet.SUCCESS){
            Log.print("SUCCESS");

            Log.printLine( indent + indent + cloudlet.getResourceId() + indent + indent + indent + cloudlet.getVmId() +
                    indent + indent + indent + dft.format(cloudlet.getActualCPUTime()) +
                    indent + indent + dft.format(cloudlet.getExecStartTime())+ indent + indent + indent + dft.format(cloudlet.getFinishTime()));
        }
    }

}
}

这里创建了新的代理并添加了新的VM，并将新的云分配给这些新的VM。下面是相同的代码片段。

Runnable monitor = new Runnable() {
    @Override
    public void run() {
        CloudSim.pauseSimulation(200);
        while (true) {
            if (CloudSim.isPaused()) {
                break;
            }
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        Log.printLine("\n\n\n" + CloudSim.clock() + ": The simulation is paused for 5 sec \n\n");

        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        DatacenterBroker broker = createBroker("Broker_1");
        int brokerId = broker.getId();

        //Create VMs and Cloudlets and send them to broker
        vmlist = createVM(brokerId, 5, 100); //creating 5 vms
        cloudletList = createCloudlet(brokerId, 10, 100); // creating 10 cloudlets

        broker.submitVmList(vmlist);
        broker.submitCloudletList(cloudletList);

        CloudSim.resumeSimulation();
    }
};

但我想做的是这样的。

Runnable monitor = new Runnable() {
    @Override
    public void run() {
        CloudSim.pauseSimulation(200);
        while (true) {
            if (CloudSim.isPaused()) {
                break;
            }
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        Log.printLine("\n\n\n" + CloudSim.clock() + ": The simulation is paused for 5 sec \n\n");

        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        /*
            The vmList, broker and brokerID are already defined in Main Thread and are available.

        */            

        cloudletList = createCloudlet(brokerId, 10, 100); // creating 10 cloudlets

        broker.submitVmList(vmlist);
        broker.submitCloudletList(cloudletList);

        CloudSim.resumeSimulation();
    }
};

这是因为我的要求是

• 在单独的线程中动态创建cloudlet(主线程用于Cloudsim.startSimulation())
• 将这些新的 cloudlet 添加到正在运行的现有虚拟机中。

Answer 1

使用CloudSim Plus您可以通过调用broker.submitCloudletList(cloudletList，delayInSeconds)来延迟Cloudlet和VM的提交。如果您想在模拟开始后动态创建 Cloudlet，您可以使用众多 Clo​​udSim Plus 监听器之一来完成此操作。您可以添加方法来创建新的 Cloudlet，例如:

private void createDynamicCloudlet(EventInfo evt) {
    if((int)evt.getTime() == 100){
        List<Cloudlet> newCloudletList = new ArrayList<>();
        System.out.printf("\n# Dynamically creating 2 Cloudlets at time %.2f\n", evt.getTime());
        Cloudlet cloudlet1 = new CloudletSimple(1000, 2);
        newCloudletList(cloudlet1);
        Cloudlet cloudlet2 = new CloudletSimple(1000, 2);
        newCloudletList(cloudlet2);
        broker0.submitCloudletList(newCloudletList);
    }
}

然后在开始模拟之前调用 simulation.addOnClockTickListener(this::createDynamicCloudletAndVm)。这将使每次模拟时钟增加时调用 createDynamicCloudlet 方法。如果时钟达到 100 秒，则会创建一个新的 Cloudlet 并将其提交给现有的代理。

您不需要更改框架类、添加新的代理实例，也不需要使用线程来执行此类任务。您可以查看整个示例 here .

如果示例有帮助，请投票。