相信许多留学生对数学代考都不陌生,国外许多大学都引进了网课的学习模式。网课学业有利有弊,学生不需要到固定的教室学习,只需要登录相应的网站研讨线上课程即可。但也正是其便利性,线上课程的数量往往比正常课程多得多。留学生课业深重,时刻名贵,既要学习知识,又要结束多种类型的课堂作业,physics作业代写,物理代写,论文写作等;网课考试很大程度增加了他们的负担。所以,您要是有这方面的困扰,不要犹疑,订购myassignments-help代考渠道的数学代考服务,价格合理,给你前所未有的学习体会。
我们的数学代考服务适用于那些对课程结束没有掌握,或许没有满足的时刻结束网课的同学。高度匹配专业科目,按需结束您的网课考试、数学代写需求。担保买卖支持,100%退款保证,免费赠送Turnitin检测报告。myassignments-help的Math作业代写服务,是你留学路上忠实可靠的小帮手!
计算机代写|云计算代写cloud computing代考|Background
Multi-server energy consumption strategy aims at reducing the power usage of the data center by using the least amount of resources that are available in the PMs while switching off inactive PMs at the data center. Man et al. [9] and Ajiro et al. [10] used different methods, such as “First Fit,” “Best Fit,” to solve VMs allocation problem. A global optimum solution is obtained from the heuristic approaches. “Best fit heuristic solution” is inaccessible because it takes more convergence time, and the proposed work has one more limitation based on a “single objective function.” Beloglazov et al. [11] recommended a “Modified Best Fit Decreasing (MBFD) algorithm” by arranging the ascending order of PMs and descending order of VMs based on their processing capability. In the “First Fit Decreasing (FFD),” VM allocation on PMs is done after VMs and PMs are sorted. The drawbacks are: Distinct allocation goal for VMs and MBFD is not flexible as huge requested VMs get influenced at the data center. The VM allocation issue is solved by using different types of algorithms. Many researchers employed bio-inspired and evolution-inspired algorithms for the cloud data center for allocation of VMs, such as “Genetic Algorithm (GA) [12],” “Particle swarm optimization (PSO),” etc. Xiong et al. [13] used PSO to resolve the issue of allocating energy-efficient VMs. The authors considered a single VM type as it is the major drawback of this research.
“Ant colony”-based VM is proposed for VM allocation by the cloud data centers by Gao et al. [14]. The authors used only a single VM and PM combination which is the drawback of their work. Wang et al. [15] recommended the use of PSO to locate efficient VMs in a data center. The drawback of this research is that the allocations of VMs change the particle velocity that requires more iterations and gives an inaccurate result. “Particle Swarm Optimization (PSO) algorithm” [16] is derived from bird flocking, its a bio-inspired algorithm [17]. It is through PSO that each particle in the swarm gives a solution with four dimensions, its present location, the position, its speed, and the location found among all the particles in the population. Its location is set in the search area based on the position its neighborhood has reached. The limitations of PSO algorithms suffer from the partial optimism that triggers less accurate velocity and distance control. PSO is unable to address particle issues in the field of energy consumption. Sharma et al. proposed “Genetic algorithm and Particle Swarm Optimization (GAPSO)” [6, 8], hybridization of GA and PSO results in increasing the fitness value of the parent chromosomes, and thus allocation of VMs to the PMs is achieved in lesser time.The limitation of GAPSO algorithm takes more convergence time.
计算机代写|云计算代写cloud computing代考|Problem Formulation
For each round of scheduling, the essence of the problem is to find a mapping of tasks to worker nodes such that the communicating tasks are packed as compact as possible. In addition, the resource constraints need to be met-the resource requirements of the allocated tasks should not exceed the resource availability in each worker node. Since the compact assignment of tasks also leads to reducing the number of used machines, we model the scheduling problem as a variant of the bin-packing problem and formulate it using the symbols illustrated in Table $5.1$.
In this work, the resource consumptions and availability are examined in two dimensions-CPU and memory. Though memory resources can be intuitively measured in terms of megabytes, the quantification of CPU resources is usually vague and imprecise due to the diversity of $\mathrm{CPU}$ architectures and implementations. Therefore, following the convention in literature [13], we specify the amount of CPU resources with a point-based system, where 100 points are given to represent the full capacity of a Standard Compute Unit (SCU). The concept of SCU is similar to the EC2 Compute Unit (ECU) introduced by Amazon Web Services (AWS). It is then the responsibility of the IaaS provider to define the computing power of an SCU, so that developers can compare the CPU capacity of different instance types with consistency and predictability regardless of the hardware heterogeneity presented in the infrastructure. As a relative measure, the definition of an SCU can be updated through benchmarks and tests after introducing new hardware to the data centre infrastructure.
In this chapter, we assume that the IaaS cloud provider has followed the example of Amazon to create a vCPU as a hyperthread of an Intel Xeon core, ${ }^6$ where 1 SCU is defined as the CPU capacity of a vCPU. Therefore, every single core in the provisioned virtual machine is allocated with 100 points. A multi-core instance can get a capacity of num_of_cores* 100 points, and a task that accounts for $p \%$ CPU usages reported by the monitoring system has a resource demand of $p$ points.

云计算代考
计算机代写|云计算代写cloud computing代考|Background
.背景信息
多服务器能耗策略的目的是在关闭数据中心不活动的pm的同时,尽可能减少pm的可用资源,从而降低数据中心的功耗。Man et al.[9]和Ajiro et al.[10]分别采用“First Fit”、“Best Fit”等不同的方法解决虚拟机分配问题。采用启发式方法求解全局最优解。“最优拟合启发式解”无法实现,因为它需要更多的收敛时间,而且所提出的工作基于“单一目标函数”还有一个限制。Beloglazov et al.[11]推荐了一种“Modified Best Fit reduction (MBFD)算法”,该算法根据PMs的处理能力排列升序和虚拟机的降序。在“First Fit reduction (FFD)”中,VM在pm上的分配是在VM和pm排序后完成的。缺点是:虚拟机分配目标不同,MBFD不灵活,大量请求的虚拟机在数据中心受到影响。VM分配问题可以通过使用不同类型的算法来解决。许多研究人员在云数据中心使用了受生物启发和受进化启发的算法来分配vm,如“遗传算法(GA)[12]”、“粒子群优化(PSO)”等。Xiong等人[13]使用粒子群算法解决了分配节能vm的问题。作者认为单一虚拟机类型是本研究的主要缺陷
Gao等人提出了基于“蚁群”的虚拟机用于云数据中心的虚拟机分配。作者只使用了单一的VM和PM组合,这是他们工作的缺点。Wang等人[15]推荐使用PSO在数据中心中定位高效的vm。该研究的缺点是vm的分配改变了粒子速度,需要更多的迭代,得到的结果不准确。“粒子群优化(PSO)算法”[16]是由蜂群进化而来的一种仿生算法[17]。正是通过粒子群算法,群中的每个粒子给出了一个四维解,包括它的当前位置、位置、速度以及在群体中所有粒子中找到的位置。它的位置是在搜索区域中基于它的邻居已经到达的位置设置的。粒子群算法的局限性在于局部乐观,导致速度和距离控制不够精确。粒子群算法无法解决能量消耗领域的粒子问题。Sharma等人提出了“遗传算法和粒子群优化(GAPSO)”[6,8], GA和PSO杂交可以提高亲本染色体的适应度值,从而在更短的时间内将vm分配给PMs。GAPSO算法的局限性是需要更多的收敛时间
计算机代写|云计算代写cloud computing代考|Problem Formulation
.问题表述
对于每一轮调度,问题的本质是找到任务到工作节点的映射,以便通信任务尽可能紧凑。此外,还需要满足资源约束—分配任务的资源需求不应超过每个工作节点中的资源可用性。由于任务的紧凑分配也会导致使用的机器数量的减少,我们将调度问题建模为装箱问题的变体,并使用表$5.1$中所示的符号来表示它。虽然内存资源可以直观地以兆字节来衡量,但是由于$\mathrm{CPU}$体系结构和实现的多样性,CPU资源的量化通常是模糊和不精确的。因此,按照文献[13]中的约定,我们使用基于积分的系统指定CPU资源的数量,其中给出100分表示标准计算单元(SCU)的全部容量。SCU的概念类似于Amazon Web Services (AWS)引入的EC2计算单元(ECU)。然后,IaaS提供者负责定义SCU的计算能力,以便开发人员能够以一致性和可预测性比较不同实例类型的CPU容量,而不管基础设施中呈现的硬件异构性如何。作为一种相对度量,在向数据中心基础设施引入新硬件后,可以通过基准测试和测试更新SCU的定义
在本章中,我们假设IaaS云提供商已经效仿Amazon创建了一个vCPU作为Intel Xeon核的超线程,${ }^6$其中1 SCU定义为vCPU的CPU容量。因此,提供的虚拟机中的每个核都分配了100个点。一个多核实例的容量为num_of_cores* 100个点,而监控系统报告的占$p \%$ CPU使用率的任务的资源需求为$p$个点

myassignments-help数学代考价格说明
1、客户需提供物理代考的网址,相关账户,以及课程名称,Textbook等相关资料~客服会根据作业数量和持续时间给您定价~使收费透明,让您清楚的知道您的钱花在什么地方。
2、数学代写一般每篇报价约为600—1000rmb,费用根据持续时间、周作业量、成绩要求有所浮动(持续时间越长约便宜、周作业量越多约贵、成绩要求越高越贵),报价后价格觉得合适,可以先付一周的款,我们帮你试做,满意后再继续,遇到Fail全额退款。
3、myassignments-help公司所有MATH作业代写服务支持付半款,全款,周付款,周付款一方面方便大家查阅自己的分数,一方面也方便大家资金周转,注意:每周固定周一时先预付下周的定金,不付定金不予继续做。物理代写一次性付清打9.5折。
Math作业代写、数学代写常见问题
留学生代写覆盖学科?
代写学科覆盖Math数学,经济代写,金融,计算机,生物信息,统计Statistics,Financial Engineering,Mathematical Finance,Quantitative Finance,Management Information Systems,Business Analytics,Data Science等。代写编程语言包括Python代写、Physics作业代写、物理代写、R语言代写、R代写、Matlab代写、C++代做、Java代做等。
数学作业代写会暴露客户的私密信息吗?
我们myassignments-help为了客户的信息泄露,采用的软件都是专业的防追踪的软件,保证安全隐私,绝对保密。您在我们平台订购的任何网课服务以及相关收费标准,都是公开透明,不存在任何针对性收费及差异化服务,我们随时欢迎选购的留学生朋友监督我们的服务,提出Math作业代写、数学代写修改建议。我们保障每一位客户的隐私安全。
留学生代写提供什么服务?
我们提供英语国家如美国、加拿大、英国、澳洲、新西兰、新加坡等华人留学生论文作业代写、物理代写、essay润色精修、课业辅导及网课代修代写、Quiz,Exam协助、期刊论文发表等学术服务,myassignments-help拥有的专业Math作业代写写手皆是精英学识修为精湛;实战经验丰富的学哥学姐!为你解决一切学术烦恼!
物理代考靠谱吗?
靠谱的数学代考听起来简单,但实际上不好甄别。我们能做到的靠谱,是把客户的网课当成自己的网课;把客户的作业当成自己的作业;并将这样的理念传达到全职写手和freelancer的日常培养中,坚决辞退糊弄、不守时、抄袭的写手!这就是我们要做的靠谱!
数学代考下单流程
提早与客服交流,处理你心中的顾虑。操作下单,上传你的数学代考/论文代写要求。专家结束论文,准时交给,在此过程中可与专家随时交流。后续互动批改
付款操作:我们数学代考服务正常多种支付方法,包含paypal,visa,mastercard,支付宝,union pay。下单后与专家直接互动。
售后服务:论文结束后保证完美经过turnitin查看,在线客服全天候在线为您服务。如果你觉得有需求批改的当地能够免费批改,直至您对论文满意为止。如果上交给教师后有需求批改的当地,只需求告诉您的批改要求或教师的comments,专家会据此批改。
保密服务:不需求提供真实的数学代考名字和电话号码,请提供其他牢靠的联系方法。我们有自己的工作准则,不会泄露您的个人信息。
myassignments-help擅长领域包含但不是全部:
myassignments-help服务请添加我们官网的客服或者微信/QQ,我们的服务覆盖:Assignment代写、Business商科代写、CS代考、Economics经济学代写、Essay代写、Finance金融代写、Math数学代写、report代写、R语言代考、Statistics统计学代写、物理代考、作业代写、加拿大代考、加拿大统计代写、北美代写、北美作业代写、北美统计代考、商科Essay代写、商科代考、数学代考、数学代写、数学作业代写、physics作业代写、物理代写、数据分析代写、新西兰代写、澳洲Essay代写、澳洲代写、澳洲作业代写、澳洲统计代写、澳洲金融代写、留学生课业指导、经济代写、统计代写、统计作业代写、美国Essay代写、美国代考、美国数学代写、美国统计代写、英国Essay代写、英国代考、英国作业代写、英国数学代写、英国统计代写、英国金融代写、论文代写、金融代考、金融作业代写。