Grid-based interoperability of workflow systems

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Grid-based interoperability of workflow systems. Moustafa Ghanem, InforSense Ltd Nabeel Azam Mike Boniface InforSense Ltd IT Innovation. Four sectors of international economic importance: Automotive Pharmaceutical Aerospace Meteorology. - PowerPoint PPT Presentation

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  • Grid-based interoperability of workflow systemsMoustafa Ghanem, InforSense Ltd

    Nabeel Azam Mike BonifaceInforSense Ltd IT Innovation

  • Background: SIMDAT Developing and applying Grid technology to support Distributed, Cross-organizational, product and process development www.simdat.org

  • Example Auto design workflows

  • Example Aero design workflows

  • SOA and Workflows: A programmers viewServicesServicesServices

  • Key challenge for workflow in SIMDATThere are 26 partners in SIMDAT

    At least 3 workflow systems in use InforSense KDETaverna/FreefluoLMS OptimusOther approaches includeVarious hard-coded wf applicationsBPEL

    Agreeing/Using a common workflow system (or language) is difficultMigration may require huge re-investmentsContinued debate on open source vs. proprietary

    In general, virtual organizations are dynamicWhat happens when we add new partners?SIMDAT partners

  • Workflow Systems: Are they really similar?

  • Workflow systems quick comparisonSimilaritiesAll have drag-drop GUIsAll use XML-based languagesSimilar conceptual model

    DifferencesDifferent language paradigms/semanticsPure Data Flow vs. Control FlowIterations (not available, implicit, explicit ?)Data types and operators supportedVarying degrees of abstractionNode granularityService call vs. abstract taskDifferent systems specialized to particular applicationsSpecialized viewersSpecialized helper nodes for data manipulation

  • Grid-based interoperability of workflow systems

  • Calling Grid Services vs Web Services

  • Example: Using of GRIA servicesGRIA uses a fully decentralized management approach, with minimal dependency between sites.

    Each site offering GRIA services makes its own business decisions about which users to trust and on what terms, and is responsible for enforcing its own access policies and deciding which applications to support.

    Sites can interact with each other, but this is driven by their common consumers, and those consumers are responsible for managing the resulting dependencies.

    There are no global agreements to set up, and no virtual organizations need be established, though users can interact according to virtual organization models if they want.

  • Example: Pharma applicationFive basic Sub-workflow nodesAllocate ResourcesUpload InputsExecuteRetrieve ResultFinish Conversation

  • Grid-based workflows and interoperability

    Run-time interoperability Workflow-based applications as servicesWorkflow enactment as services

  • Method 1: Workflow-based application as service

  • Example: Aero application

  • Method 2: Workflow enactment engine as service

  • Interoperability interaction patterns

  • Current Status

  • Next Steps: Moving from abstract to heterogeneous executable workflows

  • Overall approach

    User specifies high-level steps

    Steps iteratively instantiated using services and workflow templates

    Use service registries and workflow warehouses

    Use existing run-time interoperability mechanisms

  • Architecture

    Heterogeneous workflow warehouseInforSense Workflow warehouse

    Service RegistriesNEC Semantic Broker

    Authoring advisor: high-level steps for application domains

    Authoring assistant: map from abstract tasks to workflow fragments and services

  • Workflow warehousing and mining

  • SummaryUsing industrial strength workflow systems for cross-organization product design

    Run-time interoperability mechanisms

    Supporting the design of heterogeneous workflows

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