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Apuntes

Sistemas Distribuídos Rui Oliveira Departamento de Informática Universidade do Minho •Distributed System A collection of autonomous computing elements functioning as a single, coherent system. Sistemas Distribuídos 2 U. Minho •Design Goals - Share resources: state, functions, hardware, etc. - Achieve scalability in terms of size, geographical distance, and administrative boundaries. - Provide openness through interoperability among multiple vendors. - Ensure transparency by hiding distribution boundaries. Sistemas Distribuídos 3 U. Minho •System Architectures This refers to how distributed components are organized. •Centralized Architectures - Characterized by asymmetric roles and planned organization. •Decentralized Architectures - Consist of symmetric, peer-like components that are self-organizing. Sistemas Distribuídos 4 U. Minho •Client-Server Model - The server encapsulates resources and functions. - It is a well-known centralized entity. - Clients are anonymous and initiate synchronous interactions. - Example: Network File System. Client Server state Sistemas Distribuídos 5 U. Minho •Layered Architecture ...