cloudsim教程_云计算教程

cloudsim教程_云计算教程如何使用cloudsim?直接上github搜索cloudsim首先来个源代码,这个是cloudsimexample1这个代码的目的是创造一个主机,一个任务的数据中心。

大家好,又见面了,我是你们的朋友全栈君。如果您正在找激活码,请点击查看最新教程,关注关注公众号 “全栈程序员社区” 获取激活教程,可能之前旧版本教程已经失效.最新Idea2022.1教程亲测有效,一键激活。

Jetbrains全系列IDE稳定放心使用

如何使用cloudsim?

直接上github搜索cloudsim

Release cloudsim-3.0 · Cloudslab/cloudsim · GitHub

首先来个源代码,这个是cloudsimexample1

package org.cloudbus.cloudsim.examples;

/* * Title: CloudSim Toolkit * Description: CloudSim (Cloud Simulation) Toolkit for Modeling and Simulation * of Clouds * Licence: GPL - http://www.gnu.org/copyleft/gpl.html * * Copyright (c) 2009, The University of Melbourne, Australia */

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;

/** * A simple example showing how to create a datacenter with one host and run one * cloudlet on it. */
public class CloudSimExample1 { 
   

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

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

	/** * Creates main() to run this example. * * @param args the args */
	public static void main(String[] args) { 
   

		Log.printLine("Starting CloudSimExample1...");

		try { 
   
			// First step: Initialize the CloudSim package. It should be called
			// before creating any entities.
			int num_user = 1; // number of cloud 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
			Datacenter datacenter0 = createDatacenter("Datacenter_0");

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

			// Fourth step: Create one virtual machine
			vmlist = new ArrayList<Vm>();

			// VM description
			int vmid = 0;
			int mips = 1000;
			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 CloudletSchedulerTimeShared());

			// add the VM to the vmList
			vmlist.add(vm);

			// submit vm list to the broker
			broker.submitVmList(vmlist);

			// Fifth step: Create one Cloudlet
			cloudletList = new ArrayList<Cloudlet>();

			// properties
			int id = 0;
			long length = 400000;
			long fileSize = 300;
			long outputSize = 300;
			UtilizationModel utilizationModel = new UtilizationModelFull();

			Cloudlet cloudlet = new Cloudlet(id, length, pesNumber, fileSize, outputSize, utilizationModel, utilizationModel, utilizationModel);
			cloudlet.setUserId(brokerId);
			cloudlet.setVmId(vmid);

			// add the cloudlet to the list
			cloudletList.add(cloudlet);

			// submit cloudlet list to the broker
			broker.submitCloudletList(cloudletList);

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

			CloudSim.stopSimulation();

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

			// Print the debt of each user to each datacenter
			datacenter0.printDebts();

			Log.printLine("CloudSimExample1 finished!");
		} catch (Exception e) { 
   
			e.printStackTrace();
			Log.printLine("Unwanted errors happen");
		}
	}

	/** * Creates the datacenter. * * @param name the name * * @return the datacenter */
	private static Datacenter createDatacenter(String name) { 
   

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

		// 2. A Machine contains one or more PEs or CPUs/Cores.
		// In this example, it will have only one core.
		List<Pe> peList = new ArrayList<Pe>();

		int mips = 1000;

		// 3. Create PEs and add these into a list.
		peList.add(new Pe(0, new PeProvisionerSimple(mips))); // need to store Pe id and MIPS Rating

		// 4. Create Host with its id and list of PEs and add them to the list
		// of machines
		int hostId = 0;
		int ram = 2048; // host memory (MB)
		long storage = 1000000; // host storage
		int bw = 10000;

		hostList.add(
			new Host(
				hostId,
				new RamProvisionerSimple(ram),
				new BwProvisionerSimple(bw),
				storage,
				peList,
				new VmSchedulerTimeShared(peList)
			)
		); // This is our 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 = 0.001; // the cost of using storage in this
										// resource
		double costPerBw = 0.0; // 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
	/** * Creates the broker. * * @return the datacenter broker */
	private static DatacenterBroker createBroker() { 
   
		DatacenterBroker broker = null;
		try { 
   
			broker = new DatacenterBroker("Broker");
		} 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 + "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
						+ dft.format(cloudlet.getActualCPUTime()) + indent
						+ indent + dft.format(cloudlet.getExecStartTime())
						+ indent + indent
						+ dft.format(cloudlet.getFinishTime()));
			}
		}
	}

}

这个代码的目的是创造一个主机,一个任务的数据中心

但是第一次看到这个肯定看的云里雾里的,下面就来先分析一下这些玩意是干什么的。

  • Datacenter,顾名思义就是数据中心

  • DatacenterBroker,这个是数据中心代理,负责云计算中根据用户的qos要求协调用户以及服务供应商,以后vm绑定数据中心,还有cloudlet绑定数据中心,以及vm绑定cloudlet都和这个broker有关

  • Cloudlet,这个是指令,有四个属性

    int id = 0;就是指令的id
    long length = 40000;指令的长度
    long fileSize = 300;文件的大小
    long outputSize = 300;输出的大小
    
  • UtilizationModel,在构造cloudlet的时候,这个是必须的,是一个应用的模型

流程分析

在这里插入图片描述

  1. 首先是cloudsim的初始化,需要三个参数CloudSim.init(num_user, calendar, trace_flag),分别是云用户的数量,日期,还有是否跟踪事件。

  2. 第二部开始构建数据中心,这里的实例有一个代码

    private static Datacenter createDatacenter(String name) { 
         
    
    		// Here are the steps needed to create a PowerDatacenter:
    		// 1. We need to create a list to store
    		// our machine
    //使用一个list来存放我们的主机
    		List<Host> hostList = new ArrayList<Host>();
    
    		// 2. A Machine contains one or more PEs or CPUs/Cores.
    		// In this example, it will have only one core.
    		List<Pe> peList = new ArrayList<Pe>();
    //一个主机有多个pes或者是cpu
    //mips就是单位时间处理命令的量
    		int mips = 1000;
    
    		// 3. Create PEs and add these into a list.
    //创建pes并且加入到list里面
    		peList.add(new Pe(0, new PeProvisionerSimple(mips))); // need to store Pe id and MIPS Rating
    
    		// 4. Create Host with its id and list of PEs and add them to the list
    		// of machines
    		int hostId = 0;
    		int ram = 2048; // host memory (MB)主机内存
    		long storage = 1000000; // host storage应该是外存
    		int bw = 10000;//带宽
    
    		hostList.add(
    			new Host(
    				hostId,
    				new RamProvisionerSimple(ram),
    				new BwProvisionerSimple(bw),
    				storage,
    				peList,
    				new VmSchedulerTimeShared(peList)虚拟机的时间共享分配策略
    			)
    		); // This is our 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 = 0.001; // the cost of using storage in this
    										// resource
    		double costPerBw = 0.0; // 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;
    	}
    
  3. 创建虚拟中心代理

  4. 创建虚拟机

  5. 创建云任务,设定任务数量

  6. 分配任务到虚拟机上

  7. 启动仿真

版权声明:本文内容由互联网用户自发贡献,该文观点仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请联系我们举报,一经查实,本站将立刻删除。

发布者:全栈程序员-站长,转载请注明出处:https://javaforall.net/182504.html原文链接:https://javaforall.net

(0)
全栈程序员-站长的头像全栈程序员-站长


相关推荐

  • 提高系统可用性的那些架构策略[通俗易懂]

    提高系统可用性的那些架构策略[通俗易懂]系统高可用面临的挑战有哪些?1.资源不可用在实际业务中,出现资源不可用的原因种类可能很多,有的概率很低,比如网线被挖断了,机房失火,地震等等导致网络不可用,有的概率相对来说很高比如服务器硬件资源不足,服务器故障等等。这些问题都可能会导致对应的资源不可用。2.资源不均衡由于系统架构设计的时候没有针对高并发和大流量进行可伸缩设计,导致无法应对并发很大的场景,出现系统瘫痪甚至崩溃。3.节点功能异常这种情况是最常见的,由于代码是人写的,bug和漏洞都是难免的,所以在实际业务中大概率会出现功能

    2022年7月13日
    28
  • plsqldev 乱码「建议收藏」

    plsqldev 乱码「建议收藏」1-环境变量:NLS_LANG设置为”SimplifiedChinese_china”.ZHS16GBK2-ORACLE_HOME=D:\oracle\product\10.2.0\client即OracleClient的根目录重启plsql可以成功连接远端数据库且不乱码

    2022年5月13日
    41
  • vdbench测试过程中遇到的小问题[通俗易懂]

    vdbench测试过程中遇到的小问题[通俗易懂]vdbench测试过程中遇到的小问题1.报Slavehd2-0prematurelyterminated错误 首先根据提示查看hd2-0.stdout.html文件获取更多的错误信息,这个问题一般是未安装vdbench或者路径不一致问题…

    2022年5月19日
    161
  • 常见期望和方差_泊松分布的期望推导

    常见期望和方差_泊松分布的期望推导展开全部数学期望是分布区间e68a8462616964757a686964616f31333431343065左右两端和的平均值,方差为分布区间左右两端差值平方的十二分之一。均匀分布是经常遇到的一种分布,其主要特点是:测量值在某一范围中各处出现的机会一样,即均匀一致。故又称为矩形分布或等概率分布。均匀分布的期望:均匀分布的期望是取值区间[a,b]的中点(a+b)/2,也符合我们直观上的感受。均匀分…

    2022年9月18日
    0
  • 计算机组成原理期末复习90分以上选择填空大题总考点

    同学,你好!若觉得有用请点赞或关注~以后会发布更多有用的内容。2019-07-24更新:插入了一张“高分喷雾”。20…

    2022年4月6日
    37
  • 亿图永久激活码-激活码分享

    (亿图永久激活码)好多小伙伴总是说激活码老是失效,太麻烦,关注/收藏全栈君太难教程,2021永久激活的方法等着你。IntelliJ2021最新激活注册码,破解教程可免费永久激活,亲测有效,下面是详细链接哦~https://javaforall.net/100143.html0BXA05X8YC-eyJsaWNlbnNlSW…

    2022年3月30日
    2.6K

发表回复

您的邮箱地址不会被公开。 必填项已用 * 标注

关注全栈程序员社区公众号