Advances in Grid and Pervasive Computing: 4th International by Marcel Risch, Jörn Altmann (auth.), Nabil Abdennadher, Dana

By Marcel Risch, Jörn Altmann (auth.), Nabil Abdennadher, Dana Petcu (eds.)

This e-book constitutes the refereed court cases of the 4th foreign convention on Grid and Pervasive Computing, GPC 2009, held in Geneva, Switzerland, in may well 2009.

The forty two revised complete papers offered have been conscientiously reviewed and chosen from 112 submissions. The papers are geared up in topical sections on grid economic system, grid safety, grid functions, middleware, scheduling, load balancing, pervasive computing, sensor networks, peer-to peer in addition to fault tolerance.

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Extra info for Advances in Grid and Pervasive Computing: 4th International Conference, GPC 2009, Geneva, Switzerland, May 4-8, 2009. Proceedings

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Software Visualization in the Context of ServiceOriented Architectures. In: Proceedings of the 4th IEEE International Workshop on Visualizing Software for Understanding and Analysis (Vissoft 2007), pp. 108– 111. IEEE, Los Alamitos (2007) 6. : Ws-net: a petri-net based specification model for web services. In: IEEE International Conference on Web Services, 2004. Proceedings, July 6-9, 2004, pp. 420–427 (2004) 7. : Evaluation of Service Selection Procedures in Service Oriented Computing Networks.

Figure 7 (a) shows execution time for HD, CPU, and RAM at various time steps. 749 (b) Fig. 7. 1% for academic purpose) in 24 steps. Increasing the computation beyond 24 steps did not yield better solution for the option values, instead, it increase the cost of computation. This is in contrast to the finance market where the stock prices are highly volatile and for convergence one needs to go for very small step sizes. Since the time required to achieve a steady state in option value increases with the number of steps (number of nodes in the trinomial tree) as shown in Figure 7 (a) without yielding better solution, we stopped at 24 steps.

All replication settings provided better service levels as the original configuration. Furthermore, there were two replication settings (3 and 4) that satisfied the requirements of the Fig. 4. Overview of Results Negotiating and Enforcing QoS and SLAs in Grid and Cloud Computing 33 business process and thus allowed the mapping of its SLAs at the level of the IT architecture. These two settings caused only marginally higher costs compared to the original configuration in Amazon EC2. 6 Conclusion and Outlook We presented an approach for negotiation of SLAs of business processes and the corresponding QoS enforcement at the level of IT infrastructure.

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