Outubro 2008
Prof. Ismael H. F. Santos
- ismael@tecgraf.puc-rio.br
2
Software Concepts
nDOS (Distributed
Operating Systems)
nNOS (Network Operating Systems)
nMiddleware
Provide distribution transparency
Additional layer atop of NOS implementing general-purpose services
Middleware
Offer local services to remote clients
Loosely-coupled operating system for heterogeneous multicomputers (LAN and WAN)
NOS
Hide and manage hardware resources
Tightly-coupled operating system for multi-processors and homogeneous multicomputers
DOS
Main Goal
Description
System