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WS-VLAM
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Intro video


Try it now [Java Web Start App]. Workflow components repository [under-testing using workflow components developed in VL-e]...




News

Next Release scheduled for April 30th 2012

Core Features ... [more details]

Enabling Grid cluster on Amazon cloud ... [more details]

VL-e Prof of Concept howto ... [more details]

Launcher for MyExperiment ... [go to MyExperiment] [movie]

PC3 challenge ... [go to PC3 ]

EGEE09 September, Barcelona -... [short movie]

WS-VLAM & GridSFEA, Department of Informatics Technishe Universitat Munchen -... [pdf in German]

Demos at SuperComputing 09, Portland, Oregon ... [Dynamic network control] and [UDP traffic control ]



Historical background

In the context of the Virtual Laboratory Abstract Machine (VLAM), 2000-2004, we have developed a first prototype of a grid based workflow system, which aimed at covering the entire lifecycle of scientific workflows. VLAM had two level of abstractions: one convering the design phase of a Scientific worklfow and the second the execution phase. VLAM end users were able to share workflows,resuse each other workflow components, and execute workflow using resources across multiple organizations, using Globus middleware (GT2). The emergence of new standards around WS and SOA has forced us to rethink a number of the components of the VLAM architecture.

It was therefore decided since the beginning of the follow up project, the Virtual Laboratory for e-Science (VL-e), to re-design VLAM to fit the SOA paradigm. In the context of the new project we did an extensive survey of existing workflow systems based on the workflow requirements of the use cases proposed by the various applications in the VL-e project. This study showed that none of the systems reviewed had all of the features needed to support the use cases (users' whishlist) . We thus recommended for the first phase of the VL-e project three systems – Kepler, Taverna and Triana – to serve all the application use cases. The long-term solution would be to develop a new WMS using recent achievement in e-Science and grid technology to provide a unique and uniform interface to the VL-e applications.

Current State

We therefore developed a grid-enabled workflow management system (WS-VLAM) following the OGSA/WSRF standards defined by the Grid community. The workflow engine of the WS-VLAM is implemented as a WSRF compliant Web service making it one of the first workflow engines following the Execution Management Services described in the OGF documents. The engine supports the monitoring and interactive runtime control of the application workflows. It offers the possibility to disconnect from a long running workflow without stopping it.


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University of Amsterdam UvA
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Tel: +31(0)20 525 7514
Fax: +31 (0)20 525 7490 
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Last update:
March 2012