Efficient Retrieval of Files From Cluster Based Web Servers
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22-02-2011, 02:35 PM

.ppt   5.Efficient Retrieval of Files From Cluster Based Web Servers.ppt (Size: 75 KB / Downloads: 112)
Efficient Retrieval of Files From Cluster Based Web Servers

 State-of-the-art cluster-based data centers consisting of three tiers (Web server, application server, and database server) are being used to host complex Web services such as e-commerce applications.
 The application server handles dynamic and sensitive Web contents that need protection from eavesdropping, tampering, and forgery.
 If the SSL is used for the protection of dynamic contents, the server performance is degraded due to its high overhead.
 It is proposed a back-end forwarding scheme called SSL_with_bf to improve the performance of the server.
 The SSL_with_bf scheme can minimize the average latency by about 40 percent and improve throughput across a variety of workloads.
Existing System
 In existing system, They have used to develop the project and implimentation using Round Robin [RR] model and SSL_with_Session model.
 In RR model, requests are distributed from the same client to different nodes based on RR policy.
 In SSL_with_session model, the subsequent requests are forwarded from the same client to the same server.
Disadvantages of Existing System
 Those models are not effective. Those models are not able to give the output in time and throughput also lesser than that their expected output.
 These models make the Latency problem and Minimal throughput. For this problem, they introduced the SSL_with_bf(Backend forwarding) model is to overcome the existing problems.
Advantages of Proposed System
 This model will reduce the latency and increase the throughput than the existing system (Round Robin model and SSL_with_Session).
 The Secure SSL with bf model is very helpful for load balancing of the server
Our Work
 In our implementation, the files are uploaded into the cluster web server in an encrypted format by administrator.
 The user downloads the required encrypted file from anyone of the server based on the response time of each server.
 The time required to retrieve a file from each server is calculated.
 The file is downloaded from the server which takes minimum time for retrieval

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