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Recursive Evaluation of Fault Tolerance Mechanisms for SLA Management

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1 Author(s)
Voss, K. ; Univ. of Paderborn, Paderborn

Service level agreements (SLAs) have been introduced into the grid in order to build a basis for its commercial uptake. The challenge for Grid providers in agreeing and operating SLA-bound jobs is to ensure their fulfillment even in the case of failures. Hence, fault-tolerance mechanisms are an essential means of the provider's SLA management. The high utilization of commercial operated clusters leads to scenarios in which typically a job migration effects other jobs scheduled. The effects result from the unavailability of enough free resources which would be needed to catch all resource outages. Consequently before initiating a migration, its effects for other jobs have to be compared and the initiation of fault- tolerance (FT-) mechanisms have to be evaluated recursively. This paper presents a measurement for the benefit of initiating a FT-mechanism, the recursive evaluation, and termination condition. Performing such an impact evaluation of an initiated chain of FT-mechanisms is often more profitable than performing a single FT-mechanism and accordingly this is important for the Grid commercialization.

Published in:

Networking and Services, 2008. ICNS 2008. Fourth International Conference on

Date of Conference:

16-21 March 2008