Description
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Service Level Agreements (SLAs) are currently one of the majorresearch topics in Grid Computing, as they serve as a foundation forreliable and predictable Grids. SLAs define an explicit statement ofexpectations and obligations in a business relationship betweenprovider and customer. Thus, SLAs should guarantee the desired anda-priori negotiated Quality of Service (QoS), which is a mandatoryprerequisite for the Next Generation Grids. The complexity of an SLA-based workflow grows significantly, as characteristics of correlated sub-jobs, the data transfer phases, the deadline constraints and possible failures have to be considered. Thus, an architect for an SLA-aware workflow implementation needs sophisticated mechanisms for specification and management, sub-job mapping, data transfer optimization and fault reaction. Therefore, this dissertation presents a system for SLA-aware Grid workflows. The main contributions include an improved specification language for SLA-aware workflows, three mapping and optimization algorithms for sub-job assignment to Grid resources, an error recovery mechanism, and a prototype implementation using standard middleware.
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Minh Quan Dang Dang Minh Quan is senior researcher at the School ofInformation Technology at the International University in Bruchsal.He received his Ph.D. (2006) from the University of Paderborn,Germany. His current research centers Grid computing. In particular, he has putspecial focus on supporting management of SLA-based workflows in theGrid.
