Design, Implementation, and Performance of a Load Balancer for SIP Server Clusters

NANO SCIENTIFIC RESEARCH CENTRE PVT.LTD.,  AMEERPET, HYD

WWW.NSRCNANO.COM, 09640648777, 09652926926

JAVA PROJECTS LIST--2013

JAVA 2013 IEEE PAPERS

Design, Implementation, and Performance of a Load Balancer for SIP Server Clusters

Abstract

            This paper introduces several novel load-balancing algorithms for distributing Session Initiation Protocol (SIP) requests to a cluster of SIP servers. Our load balancer improves both throughput and response time versus a single node while exposing a single interface to external clients.We present the design, implementation, and evaluation of our system using a cluster of Intel x86 machines running Linux.We compare our algorithms to several well-known approaches and present scalability results for up to 10 nodes. Our best algorithm, Transaction Least-Work-Left (TLWL), achieves its performance by integrating several features: knowledge of the SIP protocol, dynamic estimates of back-end server load, distinguishing transactions from calls, recognizing variability in call length, and exploiting differences in processing costs for different SIP transactions. By combining these features, our algorithm provides finer-grained load balancing than standard approaches, resulting in throughput improvements of up to 24% and response-time improvements of up to two orders of magnitude. We present a detailed analysis of occupancy to show how our algorithms significantly reduce response time.

Existing System:

            While individual servers may be able to support hundreds or even thousands of users, large-scale ISPs need to support customers in the millions. A central component to providing any large-scale service is the ability to scale that service with increasing load and customer demands. A frequent mechanism to scale a service is to use some form of a load-balancing dispatcher that distributes requests across a cluster of servers. However, almost all research in this space has been in the context of either the Web or file service.

Proposed System:

            This paper presents and evaluates several algorithms for balancing load across multiple SIP servers. We introduce new algorithms that outperform existing ones. Our work is relevant not just to SIP, but also for other systems where it is advantageous for the load balancer to maintain sessions in which requests corresponding to the same session are sent by the load balancer to the same server.

Software Requirement Specification

Software Specification

Operating System       :           Windows XP

Technology                 :           JAVA 1.6, JMF

Hardware Specification

Processor                     :           Pentium IV

RAM                           :           512 MB

Hard Disk                   :           80GB

Modules:

• Load Balancer
• Agent
• SIP Cluster Servers
• Request Processing