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University of Amsterdam - UvA Faculty of Science |
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Next Release scheduled for April 30th 2012 Core Features ...
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Enabling Grid cluster on Amazon cloud ...
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VL-e Prof of Concept howto ...
Launcher for MyExperiment ...
PC3 challenge ...
EGEE09 September, Barcelona -...
WS-VLAM & GridSFEA, Department of Informatics Technishe Universitat Munchen -...
Demos at SuperComputing 09, Portland, Oregon ...
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. 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 Science Park Amsterdam 904 1098 XH Amsterdam, The Netherlands |
Tel: +31(0)20 525 7514 Fax: +31 (0)20 525 7490 gvlam-dev_no-spam_@lists.vl-e.nl |
Last update: March 2012 |