CloudSim : Introduction and Basic Programming Syntax

CloudSim : Introduction and Basic Programming Syntax

• 1.
  CloudSim : Introductionand Basic Programming Syntax Vikas Chouhan (IIT Roorkee)
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  Cloud Simulation Environment CloudSimis an extensible simulation toolkit that enables modeling and simulation of Cloud computing systems and application provisioning environments. Components of Cloud Data centers, virtual machines (VMs) and resource provisioning policies etc.
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  • CloudSim implementscore entities that simulate resource, information service, statistics, and shutdown services. • These services are used to simulate a user with application, a broker for scheduling, etc. • Interaction between these entities takes place through events. • Events are used for service request and service delivery. Events can be internal (generated by the entity which receives it) or external (generated by some other entity).
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  Main three componentsof CloudSim model: • User: The client/customer who wants access to services of cloud. • Datacenter: Service/resource provider. • Broker: Act as a mediator between user and resource/service provider.
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  Steps of CloudSimSimulation First step: Initialize the CloudSim package. It should be called before creating any entities. Second step: Create Datacenters (Datacenters are the resource providers in CloudSim. We need at list one of them to run a CloudSim simulation) Third step: Create Broker
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  Fourth step: Createvirtual machine • create VMs • add the VMs to the vmList • submit vm list to the broker Fifth step: Create Cloudlets • Create cloudlets • add the cloudlets to the list • submit cloudlet list to the broker • bind the cloudlets to the vms. This way, the broker will submit the bound cloudlets only to the specific VM
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  Sixth step: Startsthe simulation Seventh step: Stop the simulation Final step: Print results when simulation is over.
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  How to createinteger List List <Integer> intList; intList = new ArrayList <Integer>();
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  How to createcloudletlist private static List<Cloudlet> cloudletList; cloudletList = new ArrayList<Cloudlet>(); How to create vmlist private static List<Vm> vmlist; vmlist = new ArrayList<Vm>();
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  initialize cloudsim int num_user= 1; // number of cloud users Calendar calendar = Calendar.getInstance(); boolean trace_flag = false; // mean trace events CloudSim.init(num_user, calendar, trace_flag);
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  How to createvm //VM description int vmid = 0; // vertual machine id int mips = 250; // processing speed long size = 10000; //image size (MB) int ram = 512; //vm memory (MB) long bw = 1000; // bandwidth int pesNumber = 1; //number of cpus String vmm = "Xen"; //VMM name //create VMs Vm vm1 = new Vm(vmid, brokerId, mips, pesNumber, ram, bw, size, vmm, new CloudletSchedulerTimeShared());
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  How to createcloudlet //Cloudlet properties int id = 0; //cloudlet id long length = 40000; //cloudlet length long fileSize = 300; // cloudlet file size long outputSize = 300; UtilizationModel utilizationModel = new UtilizationModelFull(); Cloudlet cloudlet1 = new Cloudlet(id, length, pesNumber, fileSize, outputSize, utilizationModel, utilizationModel, utilizationModel); cloudlet1.setUserId(brokerId);
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  How to bindcloudlet to vm bindCloudletToVm ( int CloudletId , int vmId ); broker.bindCloudletToVm(cloudlet1.getCloudletId(),vm1.getId());
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  Thank You