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Efficient online monitoring of web-service SLAs

Raimondi, F; Skene, J; Emmerich, W; (2008) Efficient online monitoring of web-service SLAs. In: (pp. pp. 170-180). Green open access

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Abstract

If an organization depends on the service quality provided by another organization it often enters into a bilateral service level agreement (SLA), which mitigates outsourcing risks by associating penalty payments with poor service quality. Once these agreements are entered into, it becomes necessary to monitor their conditions, which will commonly relate to timeliness, reliability and request throughput, at run-time. We show how these conditions can be translated into timed automata. Acceptance of a timed word by a timed automaton can be decided in quadratic time and because the timed automata can operate while messages are exchanged at run-time there is effectively only a linear run-time overhead. We present an implementation to derive on-line monitors for web services automatically from SLAs using an Eclipse plugin. We evaluate the efficiency and scalability of this approach using a large-scale case study in a service-oriented computational grid. © 2008 ACM.

Type: Proceedings paper
Title: Efficient online monitoring of web-service SLAs
ISBN-13: 9781595939951
Identifier: RN/07/01
Open access status: An open access version is available from UCL Discovery
DOI: 10.1145/1453101.1453125
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
URI: https://discovery.ucl.ac.uk/id/eprint/5613
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