AvaliaÃÃo e modelagem de desempenho para planejamento de capacidade de sistema de transferÃncia eletrÃnica de fundos utilizando trÃfego em rajada

AUTOR(ES)

Carlos Julian Menezes Araujo

DATA DE PUBLICAÇÃO

2009

RESUMO

Over the last years, reliability and availability have become a crucial factor in designing computer systems, especially fault-tolerant ones. In such systems, redundant components are added to the system that continues to function uninterruptedly despite the occurrence of failures. Some well-known techniques to operate spare modules include hot standby, cold standby and TMR (Triple Modular Redundancy). Fault tolerance is achieved as a result of joining these techniques with a fault detection mechanism. Failures may in general reduce the performance of systems, prolong downtime, or cause the system to perform countermeasures. An important example of highly reliable requirements, which have not yet been attracted much attention in the literature, are Electronic Funds Transfer (EFT) systems. EFT systems ensure that customers can carry out transactions through electronic payments via debit cards, credit cards, or checks. Organizations that provide EFT are obliged to offer reliable services such as high availability and security at affordable costs, because non-availability of a contracted service may lead to serious economical consequences. The increasing popularity of electronic payment on the market illustrates the importance of achieving good performance with EFT Servers. Payment services increase with the increment of the EFT market, thus demanding that companies (e.g., stores, banks, or restaurants) offer reliable services, high availability, and security at an affordable cost. This work proposes a stochastic Petri net model to evaluate the impact of availability and reliability issues on computational resources. Furthermore, a performance evaluation methodology is proposed, with the goal of helping the process of modeling and evaluation. Lastly, case studies will be presented showing the applicability of this work

ASSUNTO(S)

sistema tef modelagem gspn modeling faults model planejamento de capacidade anÃlise de desempenho e confiabilidade gspn eft system modelo de falha ciencia da computacao performance and reliability analysis capacity planning

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