CloudSim学习笔记.doc

CloudSim首要目的：在云计算基本设施上（软件、硬件、服务）上，对不同应用和服务模型调度和分派方略性能进行量化和比较。
Example one
A simple example showing how to create a datacenter with one host and run one cloudlet on it.
静态数据：/** The cloudlet */
private static List<Cloudlet> cloudletList;
/** The vmlist. 虚拟机集合*/
private static List<Vm> vmlist;
一、初始化云库：Initialize the CloudSim package. It should be called before creating any entities.
int num_user = 1；// number of cloud users
Calendar calendar = ();
boolean trace_flag = false；// mean trace events
// Initialize the CloudSim library
(num_user,calendar,trace_flag);
二、创立数据中心：Create Datacenters ，Datacenters are the resource providers in CloudSim. We need at list one of them to run a CloudSim simulation。
Datacenter datacenter0 = createDatacenter(“datacenter0”);
三、创立中间代理：Create Broker ，同步获得代理ID
DatacenterBroker broker = createBroker();
int brokerId = ();
四、// 创立一种虚拟机，并将虚拟机列表注册到中间代理上：Create one virtual machine
vmlist = new ArrayList<Vm>();
// VM description
int vmid = 0;
int mips = 1000； //每秒百万条指令
long size = 10000；// image size (MB)
int ram = 512；// vm memory (MB)
long bw = 1000;
int pesNumber = 1；// number of cpus
String vmm = "Xen"；// VMM name
// create VM
Vm vm = new Vm(vmid，brokerId，mips，pesNumber，ram，bw，size，vmm，new CloudletSchedulerTi