Data di Pubblicazione:
2005
Citazione:
Joint optimization of hardware and network costs for distributed computer systems / D. Ardagna, C. Francalanci, M. Trubian. - Milano : Università degli Studi di Milano. Dipartimento di Scienze dell'Informazione, 2005.
Abstract:
Multiple combinations of hardware and network components can be selected to design an
information technology (IT) infrastructure that satisfies requirements. The professional criterion to
deal with these degrees of freedom is cost minimization. However, a scientific approach has been
rarely applied to cost minimization, especially for the joint optimization of hardware and network
systems. This paper provides an overall methodology for combining hardware and network design
in a single cost-minimization problem for multi-site computer systems. Costs are minimized by
applying a heuristic optimization approach to a sound decomposition of the problem. We consider
most of the design alternatives enabled by current hardware and network technologies, including
server sizing, localization of multi-tier applications and reuse of legacy systems.
The methodology is empirically verified with a database of costs that has also been built as part of
this research. Verifications consider several test cases with different computing and communication
requirements. Cost reductions are evaluated by comparing the cost of methodological results with
those of architectural solutions obtained by applying professional design guidelines. The quality of
heuristic optimization results is evaluated through comparison with lower bounds.
Tipologia IRIS:
08 - Relazione interna o rapporto di ricerca
Elenco autori:
D. Ardagna, C. Francalanci, M. Trubian
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