Architectural Plan for Constructing Fault Tolerable Workflow Engines Based on Grid Service

In this paper the design and implementation of fault tolerable architecture forscientific workflow engines is presented. The engines are assumed to beimplemented as composite web services. Current architectures for workflow enginesdo not make any considerations for substituting faulty web services with correctones at run time. The difficulty is to rollback the execution state of the workflowengine to its state before the invocation of the faulty web service. To achieve this,three components for fault diagnosis, recording the execution state of the workflowand substitution of faulty web services, at run time, are considered in our proposedarchitecture. The applicability of the proposed architecture is practically evaluatedby applying it to design of three different scientific workflow engines.

کلیدواژه ها:

workflow engine ، SOA ، web service ، grid service