فایل ورد کامل تعادل بار پویا با استفاده از شبکه مبتنی بر نرم افزار

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تعداد صفحات این فایل: ۱۲ صفحه

بخشی از مقاله انگلیسیعنوان انگلیسی:Dynamic Load Balancing using Software Defined Networks~~en~~

Abstract

In the today’s modern age the usage of internet has been increasing tremendously. Hence high network traffic which requires many services such as DNS to control. To solve this load balancing are being used. But dedicated load balancers are expensive and quickly become a single point of failure and congestion. But this can be improved for better working. In my approach software defined network using OpenFlow protocol was implemented to improve the efficiency. In the Future Internet, Software-Defined Network (SDN) is seen as one of the most promising paradigm. By using this technique the network becomes directly programmable and agile. Here the http requests from different clients will be directed to different pre-defined http servers based on round robin scheduling. Round robin scheduling is easy to implement and are best to be used in geographically distributed web servers.

۱ Introduction

Load balancing is a significant technology and it can help save power and improve resource utilization in network [1]. The current network infrastructure relies on a vertical architecture based on a variety of software and hardware, thus creating a scenario with little flexibility. Such lack of flexibility has undesirable effects recently coined as Internet ossification. SDN is a new paradigm that breaks the vertical integration between the network control plane and its data plane. SDN users can composite application programs run on top of the controller to monitor and manage the whole network in a centralized and real-time manner [7]. The SDN controllers decides how to manage the packet or which task has to perform such that which packet can be dropped or can be added a new flow entry in order to forward similar packets in the future.

A typical load balancing technique is to use a dedicated load balancer to forward the client requests to different servers, this technique requires dedicated hardware support which is expensive, lacks of flexibility and is easy to become a single point failure [13]. Here we describe the implementation of a dynamic load balancing algorithm to distribute the different traffic flows carried by a network through the different parallel paths between source and destination. OpenFlow is the most common protocol used in SDN networks which are used to communicate the controller with all the Network Elements.

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