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

This booklet constitutes the refereed court cases of the 4th foreign convention on Grid and Pervasive Computing, GPC 2009, held in Geneva, Switzerland, in might 2009.

The forty two revised complete papers awarded have been rigorously reviewed and chosen from 112 submissions. The papers are prepared in topical sections on grid financial system, grid safeguard, grid functions, middleware, scheduling, load balancing, pervasive computing, sensor networks, peer-to peer in addition to fault tolerance.

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

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3 Work Structure The remainder of this work is structured as follows: Section 2 gives an overview of our proposed approach and puts it in the context of related research in the areas of service-oriented computing, QoS-aware platforms and grid workflow optimization. Section 3 describes the formalization of service and QoS levels as a main precondition for the negotiation of SLAs. Section 4 deals with performance and availability as NFPs that are representative for the approach and their enforcement in grid and cloud computing environments.

LNCS, vol. 2512, pp. 57–67. Springer, Heidelberg (2002); (revised papers) 11. : SLAng: A Language for Defining Service Level Agreements. In: Proc. of the 9th IEEE Workshop on Future Trends in Distributed Computing Systems-FTDCS, pp. 100–106 (2003) 12. : Web Services Agreement Specification (WSAgreement). Global Grid Forum GRAAP-WG, Draft (August 2004) 13. : Towards Ubiquitous Computing with Quality of Web Service Support. Upgrade, The European Journal for the Informatics Professional VI(5), 29–34 (2005) 14.

18 D. K. Thulasiram, and P. Thulasiraman USER 1 USER 2 USER 3 ... USER N USER APPLICATIONS METASCHEDULER SLA: Monitoring QoS: Monitoring Condor G METASCHEDULER PRICE & USAGE OPTIMIZATION LEVEL Condor G GRID RESOURCES BROKER (GRB) GRID RESOURCES BROKER (GRB) LEVEL 3 PRICING MODEL / ALGORITHMS CHARGING & ACCOUNTING PRICING MODEL / ALGORITHMS GRID SERVICES LEVEL 2 GRID MIDDLEWARE (GLOBUS) GRID MIDDLEWARE (NIMROD/G) GRID MIDDLEWARE LEVEL 1 GRID COMPUTE COMMODITIES (gcc) GRID RESOURCES LEVEL 0 Fig. 1.

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