Performability analysis of highly available clusters with break-downs and deferred repairs.

Conference paper


Ever, E., Gemikonakli, O. and Chakka, R. 2006. Performability analysis of highly available clusters with break-downs and deferred repairs. HET-NETs '06 : 4th International working conference on performance modelling and evaluation of heterogeneous networks.. Ilkley, West Yorkshire, U.K pp. 05/1-05/9
TypeConference paper
TitlePerformability analysis of highly available clusters with break-downs and deferred repairs.
AuthorsEver, E., Gemikonakli, O. and Chakka, R.
Abstract

Fault-tolerant systems with repair-upon-failure strategy can become expensive in terms of labour and time. While postponing these repairs, it is essential to keep the whole system capable to deal with user requests. For this purpose, usually, a threshold value is defined which represents the minimum number of servers the system administrator should keep operative. Highly available multiprocessor systems with one head and several computation nodes is a common configuration in various cluster systems used as a low-cost alternative to supercomputers. It is typical to introduce a redundant head for such systems to improve availability. Deferred repairs can be used for such systems for reducing repair costs when no permanent repair facility exists on premises. Performability evaluation of such systems is very important since the systems are fault tolerant. In this paper, the performance modelling for highly available multiprocessor systems is presented. For these systems, one main and several identical computing nodes serving the same stream of arriving jobs is considered. To improve the availability of the system, the head node is backed-up. To account for delays due to switching of head node, such systems are modelled and solved for exact performability measures for both bounded and unbounded queuing systems assuming a deferred repair strategy.

Research GroupSensoLab group
ConferenceHET-NETs '06 : 4th International working conference on performance modelling and evaluation of heterogeneous networks.
Page range05/1-05/9
Publication dates
Print2006
Publication process dates
Deposited30 Mar 2009
Output statusPublished
Web address (URL)http://www.comp.brad.ac.uk/het-net/tutorials/P05.pdf
LanguageEnglish
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