Outline

  • Abstract
  • Keywords
  • I. Introduction
  • II. Related Work
  • III. Cloud Computing Service Models
  • IV. Deployment of Cloud Models
  • V. Advantages of Cloud Computing
  • VI. Quality of Service in Cloud Computing
  • VII. Design and Implementation
  • VIII. Conclusion
  • References

رئوس مطالب

  • چکیده
  • کلید واژه ها
  • 1. مقدمه
  • 2. تحقیقات مرتبط
  • 3. مدل های خدمات محاسبات ابری
  • A. زیر ساختار به عنوان سرویس - IaaS
  • B. پایگاه به عنوان خدمات - PaaS
  • C. نرم افزار به عنوان خدمات - SaaS
  • 4. توسعه مدل های ابری
  • 5. مزایای محاسبات ابری
  • A. معیار بندی
  • B. امنیت
  • C. عملکرد
  • D. ثبات پذیری
  • 6. کیفیت خدمات در محاسبات ابری
  • A. خدمات متمایز (DiffServ)
  • B. خدمات ترکیبی (IntServ)
  • C. شاخه های صف بندی
  • D. نمودار های اینت-سرو و دیف -سرو
  • 7. طراحی و اجرا
  • A. طراحی سناریو
  • B. پارامترهای شبیه سازی
  • C. شبیه سازی
  • 8. نتیجه گیری

Abstract

Cloud computing, bright venture of today and tomorrow, is rising based on the idea of the use of online information, software and hardware. Cloud computing provides users three different kinds of service models, infrastructure services, platform services and software services, which are in the run all together as requested and meets the needs of users. Benefits of cloud computing include increased security, monitoring and maintenance of the technical infrastructure by the provider, cost-savings, efficient use of resources, high flexibility, accessibility and device independence. This paper describes the cloud computing technology with its features and advantages in business life. Traffic of a medium-sized company is examined in two different scenarios, LAN network and cloud computing network, and compared according to ftp, email, HTTP traffics using OPNET. In second part of the study, DiffServ and IntServ quality of service terms are studied over cloud computing model. A new approach is studied in order to improve the performance of cloud computing network in a medium sized company by combining IntServ and DiffServ in same network model. This model serves an improvement in business applications using cloud computing technology.

Keywords: - - - - -

Conclusions

Cloud computing allows all kind of user profiles to use same software, same database, same infrastructure at any time from any location that has internet connection. At the same time, complaints or satisfactions of clients are immediately detected and answered, as soon as possible. Thus, the quality and flexibility of the services can be provided and cost advantages can be obtained. With this application, it is possible to avoid waste of unnecessary performance, electricity use and labor. Savings can be reached on global scale.

In first part of the study, two network infrastructures are designed (Cloud and LAN model) and their performances are compared in HTTP, E-mail and FTP traffic. As a result, cloud model showed better performance in all three traffic type under specified conditions. In the second part, we evaluated the QoS that can be obtained when Integrated Services (IntServ) subnetworks are connected together using Differentiated Services (DiffServ) network. Results of different queuing for QoS management of IntServ/DiffServ networks, is reported. With this work, assigning QoS profiles to the cloud model, performance improvement is gathered in cloud model in all three traffic conditions.

As a future work, it is possible to study on QoS mechanism and dynamic mapping of DiffServ/IntServ in order to improve performance of the cloud network and the studies can be implemented on big scale networks. Likewise, using other QoS profiles, different combinations and methods better performances can be reachable. The advantages of using cloud computing technology widely in business and daily life shall encourage researchers to spend time on cloud technology.

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