Avaliação de disponibilidade de redes de computadores baseadas na arquitetura cliente/servidor em n-camadas.

Abstract

Nowadays, corporate computer networks are based on multi-tier client/server architectures. Some constraints on the connectivity among clients and servers (and among servers) must be satisfied for the clients to receive complete services from the network. However, failures in the links, interconnection equipments and servers can affect this connectivity. Therefore, failures can affect service availability for some clients, but not all. This work proposes a new network availability measure: the fraction of clients that are receiving complete services in computer networks based on multi-tier client/server architectures, considering its component failures. In addition, a method for the evaluation of network availability using the new measure is proposed.