Projeto e implementação de um servidor world wide web proxy com suporte a recursos espelhados.

Abstract

The unavailability of resources, is one of the main problems faced by the World Wide Web users nowadays. This problem is normally caused by failures in the Web's infra-structure and can be solved by the introduction of redundancy on the system, by means of replicating its resources. Resource replication allows the redution of the probability of the unavailability of resources. Unfortunately, the resource identification scheme provided by the Web does not support resource replcation because it maps the resource identification on a unique physical location. Our proposal uses a new resource identification scheme that can be used to implement the mirroring of Web resources. This is implemented by a proxy that is able to access this mirrored resources. The recovery of mirrored resources is improved by a load balancing mechanism.