A Fault Tolerant Approach Based on Measurement Indexes for Data Transmission Optimization in Distributed Web Servers Architectures

In the paper, an analytical model based on measurement indexes is developed to assure the property of reliability of a Web server's network. The proposed approach, making use of a fault tolerant technique, allows data transmission optimization in dispatching process. Simulations, representative of different operative conditions of network, evaluated through the measurement indexes used, have been carried out. Experimental results have been achieved applying the proposed algorithm to a real system, consisting of a Web servers system controlling measurement instrumentation to perform a wide variety of measurement experiments and deliver the results

1. INTRODUCTION

Access time to a file W, through an internet connection, can be reduced by means of a fault tolerant dispatching algorithm. In this way a document W is replied on the N web servers [1].