روش نوين توزيع بار ترافيک مبتنی بر BGP در مراکز داده توزيع‌شده جغرافيايي
محورهای موضوعی : مهندسی برق و کامپیوترامیر اسمعیلی 1 , بهادر بخشی سراسکانرود 2
1 - دانشگاه صنعتی امیرکبیر
2 - دانشگاه صنعتی امیرکبیر
کلید واژه: توزیع بار ترافيکیمراکز داده توزيع‌شدهBGPanycastشبکه‌هاي نرم‌افزار محور,
چکیده مقاله :
مسایل مربوط به مراکز داده به عنوان زیرساخت ارائه سرویس‌های فناوری اطلاعات همواره حایز اهمیت بوده است. از سوی دیگر در سال‌های اخیر، بنا به دلایل متعددی از جمله تفاوت هزینه انرژی در نقاط مختلف، امنیت بالاتر و تأمین کیفیت سرویس، مراکز داده توزیع‌شده جغرافیایی مورد توجه قرار گرفته است که در آن مرکز داده متشکل از چندین خوشه در نقاط مختلف است. مسأله اصلی در این نوع مراکز داده، توزیع کارای بار ترافیکی بین خوشه‌ها است. با وجود این که روش‌های متعددی برای این منظور پیشنهاد شده است ولی به دلیل متمرکزبودن توزیع‌کننده، سرعت پایین واکنش به تغییرات بار ترافیکی و یا محدودبودن به یک تکنولوژی خاص، راه حل کارا، عملی و جامع این مسأله به شمار نمی‌روند. در این مقاله معماری جدیدی پیشنهاد شده که در آن برای توزیع بار ترافیکی، مفهوم مسیریابی anycast با تنظیمات مناسب BGP و در نظر گرفتن ملاحظات عملی پیاده‌سازی می‌شود. نتایج شبیه‌سازی بهبود قابل توجه این روش نسبت به روش‌های موجود را نشان می‌دهد.
Today, hosting services in geographically distributed data centers is very common among service provider companies, because of more efficiency of energy consumption, high availability of the system, and providing quality of service. Load distribution is the main issue in the geographical data centers. On the one hand, there are several architectures to distribute load between different clusters, e.g., central load balancer, DNS-based systems, and IGP based schemes; one the other hand, the optimum traffic load balancing between clusters is a very challengeable issue. The proposed solutions have different facilities to distribute incoming traffic; nevertheless, they are vulnerable in terms of propagation delay, centralized load balancer failure, and maintaining connections. In this paper, a new architecture based on BGP and Anycast routing protocols in SDN based data centers is proposed to distribute traffic loads between clusters. Simulation result shows improvement in comparison to the existing techniques.
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