Workflow-level parameter study management in multi-grid environments by the P-GRADE grid portal
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Date
2006Author
Farkas, Zoltan
Gabor, Hermann
Kacsuk, Peter
Sipos, Gergely
Toth, Adrian
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Show full item recordAbstract
Workflow applications are frequently used in many production Grids. There is a natural need to run the same workflow
with many different parameter sets. Unfortunately current Grid portals either do not support this kind of applications
or give only specialized support and hence users are obliged to do all the tedious work needed to manage such
parameter study applications. P-GRADE portal has been providing a high-level, graphical workflow development and
execution environment for various Grids (EGEE, UK NGS, GIN VO, OSG, TeraGrid, etc.) built on second and third
generation Grid technologies (GT2, LCG-2, GT4, gLite). Feedback from the user communities of the portal showed
that parameter study support is highly needed and hence the next release of the portal will support the workflow-level
parameter study applications. The current paper describes the semantics and implementation principles of managing
and executing workflows as parameter studies. Two algorithms are described in detail. The black box algorithm
optimizes the usage of storage resources while the PS-labeling algorithm minimizes the load of Grid processing
resources. Special emphasis is on the concurrent management of large number of files and jobs in the portal and in the
Grids as well as providing a user-friendly, easy-to-use graphical environment to define the workflows and monitor
their parametric study execution.
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