Optimal deployment of geographically distributed workflow engines on the Cloud

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)
11 Downloads (Pure)


When orchestrating Web service workflows, the geographical placement of the orchestration engine(s) can greatly affect workflow performance. Data may have to be transferred across long geographical distances, which in turn increases execution time and degrades the overall performance of a workflow. In this paper, we present a framework that, given a DAG-based workflow specification, computes the op- timal Amazon EC2 cloud regions to deploy the orchestration engines and execute a workflow. The framework incorporates a constraint model that solves the workflow deployment problem, which is generated using an automated constraint modelling system. The feasibility of the framework is evaluated by executing different sample workflows representative of sci- entific workloads. The experimental results indicate that the framework reduces the workflow execution time and provides a speed up of 1.3x-2.5x over centralised approaches.
Original languageEnglish
Title of host publication 6th IEEE International Conference on Cloud Computing Technology and Science (CloudCom 2014)
Number of pages6
ISBN (Print) 9781479940936
Publication statusPublished - 30 Oct 2014


  • Workflow engine
  • Optimal deployment
  • Cloud computing
  • Workflow execution


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