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Performance and Availability Assessment for the Configuration of Distributed Workflow Management Systems

  • Michael Gillmann
  • Jeanine Weissenfels
  • Gerhard Weikum
  • Achim Kraiss
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1777)

Abstract

Workflow management systems (WFMSs) that are geared for the orchestration of enterprise-wide or even “virtual-enterprise”-style business processes across multiple organizations are complex distributed systems. They consist of multiple workflow engines, application servers, and ORB-style communication servers. Thus, deriving a suitable configuration of an entire distributed WFMS for a given application workload is a difficult task.

This paper presents a mathematically based method for configuring a distributed WFMS such that the application’s demands regarding performance and availability can be met while aiming to minimize the total system costs. The major degree of freedom that the configuration method considers is the replication of the underlying software components, workflow engines and application servers of different types as well as the communication server, on multiple computers for load partitioning and enhanced availability. The mathematical core of the method consists of Markov-chain models, derived from the application’s workflow specifications, that allow assessing the overall system’s performance, availability, and also its performability in the degraded mode when some server replicas are offline, for given degrees of replication. By iterating over the space of feasible system configurations and assessing the quality of candidate configurations, the developed method determines a configuration with near-minimum costs.

Keywords

Unify Modeling Language Application Server Service Request Server Type State Chart 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Michael Gillmann
    • 1
  • Jeanine Weissenfels
    • 1
  • Gerhard Weikum
    • 1
  • Achim Kraiss
    • 2
  1. 1.University of the SaarlandGermany
  2. 2.Dresdner Bank AGGermany

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