Nimrod/O

Parametric computational experiments are becoming increasingly important in science and engineering as a means of exploring the behavior of complex systems. For example, an engineer may explore the behaviour of a wing by running a computational model of the airfoil multiple times while varying key parameters such as angle of attack, air speed, etc. The results of these multiple experiments yield a picture of how the wing behaves in different parts of parametric space.

Over the past several years, we have developed a specialized parametric modeling system called Nimrod. Nimrod uses a simple declarative parametric modeling language to express a parametric experiment and provides machinery that automates the task of formulating, running, monitoring, and collating the results from the multiple individual experiments. Equally important, Nimrod incorporates a distributed scheduling component that can manage the scheduling of individual experiments to idle computers in a local area network. Together, these features mean that even complex parametric experiments can be defined and run with little programmer effort. In many cases it is possible to establish a new experiment in minutes. Nimrod has been applied to a range of application areas, including Bioinformatics, Operations Research, Network Simulation, Electronic CAD, Ecological Modelling and Business Process Simulation.

Nimrod comes in a number of flavours. EnFuzion is a commercial quality solution and is available for Clusters. Nimrod/G is a research prototype and operates on a computational grid. Nimrod/O has been designed for performing automatic design optimisation. Active Sheets provides a spread sheet interface for Nimrod/G, EnFuzion and NetSolve, allowing spread sheets to perform parallel computations on the grid. Finally, the Nimrod Portal allows a user to specify and control a computational experiment from a browser. A testbed called the Australan Nimrod Testbed is being built to support routine parametric computational experiments.

Monash University, and the Nimrod project, is proud to be an Academic Affiliate of the Globus Alliance.

Breaking News ....

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