SLA Design from a Business Perspective

  • Jacques Sauvé
  • Filipe Marques
  • Antão Moura
  • Marcus Sampaio
  • João Jornada
  • Eduardo Radziuk
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3775)

Abstract

A method is proposed whereby values for Service Level Objectives (SLOs) of an SLA can be chosen to reduce the sum IT infrastructure cost plus business financial loss. Business considerations are brought into the model by including the business losses sustained when IT components fail or performance is degraded. To this end, an impact model is fully developed in the paper. A numerical example consisting of an e-commerce business process using an IT service dependent on three infrastructure tiers (web tier, application tier, database tier) is used to show that the resulting choice of SLOs can be vastly superior to ad hoc design. A further conclusion is that infrastructure design and the resulting SLOs can be quite dependent on the “importance” of the business processes (BPs) being serviced: higher-revenue BPs deserve better infrastructure and the method presented shows exactly how much better the infrastructure should be.

References

  1. 1.
    Machiraju, V., Bartolini, C., Casati, F.: Technologies for Business Driven IT Management. In: Cavedon, L., Maamar, Z., Martin, D., Benatallah, B. (eds.) Extending Web Services Technologies: the Use of Multi-Agent Approaches. Kluwer Academic Publishers, Dordrecht (2004)Google Scholar
  2. 2.
    Bartolini, C., Sallé, M.: Business Driven Prioritization of Service Incidents. In: Proc. 15th IFIP/IEEE Distributed Systems: Operations and Management (DSOM 2004), Davis, CA, USA, (November 15-17, 2004)Google Scholar
  3. 3.
    Mason, P.: A New Culture for Service-Level Management: Business Impact Management, IDC White PaperGoogle Scholar
  4. 4.
    Casati, F., Castellanos, M., Dayal, U., Hao, M., Sayal, M., Shan, M.C.: Business Operation Intelligence Research at HP Labs. Bulletin of the IEEE Computer Society Technical Committee on Data Engineering (2002)Google Scholar
  5. 5.
    Casati, F., Shan, E., Dayal, U., Shan, M.C.: Business-Oriented Management of Web Services. Communications of the ACM (October 2003)Google Scholar
  6. 6.
    Liu, Z., Squillante, M., Wolf, J.: On Maximizing Service-Level Agreement Profits. In: ACM Electronic Commerce Conference (October 2001)Google Scholar
  7. 7.
    Diao, Y., Hellerstein, J., Parekh, S.: A Business-Oriented Approach to the Design of Feedback Loops for Performance Management. In: Proc. of the 12th International Workshop on Distributed Systems: Operations and Management (2001)Google Scholar
  8. 8.
    Janakiraman, G., Santos, J., Turner, Y.: Automated Multi-Tier System Design for Service Availability. In: Proceedings of the First Workshop on Design of Self-Managing Systems (June 2003)Google Scholar
  9. 9.
    Ardagna, D., Francalanci, C.: A Cost-Oriented Methodology for the Design of Web-Based IT Architectures. In: Proceedings of the 2002 ACM symposium on Applied Computing (2004)Google Scholar
  10. 10.
    Aiber, S., Gilat, D., Landau, A., Razinkov, N., Sela, A., Wasserkrug, S.: Autonomic Self-Optimization According to Business Objectives. In: Proceedings of the International Conference on Autonomic Computing (2004)Google Scholar
  11. 11.
    Taylor, R., Tofts, C.: Death by a thousand SLAs: a short study of commercial suicide pacts, HP Technical Report (January 2005)Google Scholar
  12. 12.
    Sallé, M., Bartolini, C.: Management by Contract. In: Proceedings of the 2004 IEEE/IFIP Network Operations and Management Symposium, Seoul, Korea (April 2004)Google Scholar
  13. 13.
    Menascé, D., Almeida, V., Dowdy, L.: Performance by Design. Prentice Hall PTR, Englewood Cliffs (2004)Google Scholar
  14. 14.
    Kleinrock, L.: Queuing Systems, Vol I: Theory. Wiley, New York (1975)MATHGoogle Scholar
  15. 15.
    Trivedi, K.S.: Probability & Statistics with Reliability, Queuing and Computer Science Applications. Prentice-Hall, Englewood Cliffs (1982)MATHGoogle Scholar

Copyright information

© IFIP International Federation for Information Processing 2005

Authors and Affiliations

  • Jacques Sauvé
    • 1
  • Filipe Marques
    • 1
  • Antão Moura
    • 1
  • Marcus Sampaio
    • 1
  • João Jornada
    • 2
  • Eduardo Radziuk
    • 2
  1. 1.Universidade Federal de Campina GrandeBrazil
  2. 2.Hewlett-PackardBrazil

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