GridPP is a collaboration of UK Particle Physicists and Computer Scientists working together to create a Grid for particle physics, enabling them to process the vast volumes of data generated in experiments. The LHC, a particle accelerator which will probe the nature of matter, is expected to generate data at a rate equivalent to 20 million CDs a year.

Professor Ian Halliday, Chief Executive of PPARC, said GridPP2 will place UK particle physicists in a prime position to exploit physics from the Large Hadron Collider.

"The GridPP2 Grid will address the future computing requirements of all the UK Particle Physics Experiments and should provide efficient sharing of resources between Particle Physics and other disciplines at the institutes." added Steve Lloyd, GridPP Collaboration Board Chair.

Grid computing shares the resources of connected computers, much as the World Wide Web (also created at CERN) enables the sharing of information between computers. By connecting large numbers of computers together, particle physicists are able to run simulations and analysis in a fraction of the time it would take to run on a single machine. Such work can also be done on supercomputers, but as these are custom built they are expensive and in high demand. The benefit of Grid computing is that it is constructed from cheap units and can be expanded or reduced to fit the users needs.

Dr Neil Geddes, PPARCs Director of E-Science said Todays money will be used to create a grid equivalent to 20,000 1GHz personal computers. This is the largest in the world to be funded so far.

For the past year, GridPP have been running a prototype grid or testbed across ten UK sites. From this they have developed the middleware needed for a larger Grid.

"GridPP2 will test new Grid computing technologies on a scale that we could have barely considered two years ago." said Tony Doyle, the GridPP Project Leader The Grid deployed in phase 1 taught us about the importance of a series of testbeds where the software is incrementally integrated and tested within an annual deployment lifecycle. Running a stable large-scale grid service will be a major challenge and for this reason a key component of GridPP2 will be the establishment a core production team at the heart of deployment."

Middleware is the programming that allows the software (the programmes the scientists are using) to take advantage of the hardware (the computing resources they need to access). Middleware tackles issues such as security (e.g. allowing outside users access to a sites computers) and brokering (breaking data up into packages to be sent around the country or even world for rapid processing).

GridPPs testbed was incorporated into the LHC Computing Grid in September 2003, which was the first time a production grid was deployed world-wide. GridPP is also working with projects such as the EU-funded Enabling Grids for E-Science in Europe (EGEE) which will integrate current national, regional and thematic Grid efforts to create a seamless European Grid infrastructure for the support of the European Research Area.

The experience gained in the GridPP project forms the basis of the much wider deployment of scientific computing grids which we are seeing across UK Universities through the UK's e-Science programme. Industry has also been quick to appreciate the benefits of these technologies.

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