Foraging for Better Deployment of Replicated Service Components

Authors:
Máté J. Csorba;Hein Meling;Poul E. Heegaard;Peter Herrmann
Affiliations:
Department of Telematics, Norwegian University of Science and Technology, Trondheim, Norway N-7491;Department of Electrical Engineering and Computer Science, University of Stavanger, Stavanger, Norway N-4036;Department of Telematics, Norwegian University of Science and Technology, Trondheim, Norway N-7491;Department of Telematics, Norwegian University of Science and Technology, Trondheim, Norway N-7491
Venue:
DAIS '09 Proceedings of the 9th IFIP WG 6.1 International Conference on Distributed Applications and Interoperable Systems
Year:
2009

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Abstract

Our work focuses on distributed software services and their requirements in terms of system performance and dependability. We target the problem of finding optimal deployment mappings involving multiple services, i.e. mapping service components in the software architecture to the underlying platforms for best possible execution. We capture important non-functional requirements of distributed services, regarding performance and dependability. These models are then used to construct appropriate cost functions that will guide our heuristic optimization method to provide better deployment mappings for service components. This paper mainly focuses on dependability. In particular, a logic enabling replication management and deployment for increased dependability is presented. To demonstrate the feasibility of our approach, we model a scenario with 15 services each with different redundancy levels deployed over a 10-node network. We show by simulation how the deployment logic proposed is capable to satisfy replica deployment requirements.