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American and European supercomputing infrastructures linked through a common wide-area global file system

Seattle, Nov 15, 2005

TeraGrid (, the US supercomputing cyber­infrastructure, and DEISA (, the corresponding European supercomputing grid infrastructure, have been linked, for the purposes of a technology demonstration, by a common, scalable, wide-area global file system spanning two continents.

The bridging of communities in the old and the new world were showcased during the Supercomputing Conference SC05 at Seattle . It was shown that any scientist, accessing TeraGrid from any of the participating sites in the US, or accessing DEISA from any of the DEISA sites in France, Germany or Italy, can directly and transparently create or access collaborative data stored in the now linked grid-wide global file systems of TeraGrid and DEISA with one common file address space. The even more important aspect is that the same is true for applications which, executed at any of the participating sites, transparently access data in the common file address space.

High performance wide-area global file systems as GPFS from IBM open totally new modes of operation within grid infrastructures, especially in supercomputing grids with a fairly limited number of participating sites. A common data repository with fast access, transparently accessible both by applications running anywhere in the grid, and by scientists working at any partner site as entry point to the grid, greatly facilitates cooperative scientific work at the continually increasing geographically distributed scientific communities.

Both DEISA and TeraGrid have begun using the high performance wide-area global file system GPFS from IBM in production mode. For the technology demonstration, the dedicated DEISA and TeraGrid networks were interconnected with the help of specialists from GEANT, Abilene/Internet2, and the national research networks from France , Germany , and Italy (RENATER, DFN, GARR). They established a two continent spanning high performance network between TeraGrid sites at The San Diego Supercomputer Center (SDSC), Chicago, and Indiana, and DEISA sites in several European countries ( France , Germany , Italy ). Over this dedicated connection, DEISA and TeraGrid global file systems were merged into one common global file system. This network connection between the two infrastructures is expected to become persistent at some time in the future.

The demonstration featured the execution of supercomputing applications of various scientific disciplines which were carried out both as TeraGrid and as DEISA applications. Single site applications transparently wrote their results to the intercontinental global file system, ready for transparent further processing from other access grid access points.

Featured applications for the demo included a Protein Structure Prediction and a Cosmological Simulation carried out at SDSC , US ( and a Gyrokinetic Turbulence Simulation and also a Cosmological Simulation carried out at Garching Computing Centre of the Max Planck Society (RZG), Germany ( .



Sponsored by the National Science Foundation (NSF), the TeraGrid is a partnership of researchers, computational experts, and resource providers that together provide a comprehensive cyberinfrastructure to enable discovery in science and engineering. TeraGrid and its education and mentoring programs connect and broaden scientific communities.  NSF established the TeraGrid resources and their integration as part of a Major Research Equipment construction project from 2001 to 2004. In August 2005, NSF extended its support for the TeraGrid a set of awards for operation, user support and enhancement of the TeraGrid facility over the next five years.  Eight resource provider partners (Indiana University, National Center for Supercomputing Applications, Oak Ridge National Laboratory, Pittsburgh Supercomputing Center, Purdue University, San Diego Supercomputer Center, Texas Advanced Computing Center, and The University of Chicago / Argonne National Laboratory) were funded along with an award to the University of Chicago to coordinate and integrate TeraGrid via the Grid Infrastructure Group (GIG).

TeraGrid Contact: Scott Lathrop, University of Chicago and Argonne National Laboratory (

DEISA, the Distributed European Infrastructure for Supercomputing Applications, is an EU FP6 Research Infrastructure project. All major European supercomputing centres are jointly deploying and operating a unified supercomputing infrastructure on top of national services. The DEISA Consortium is constituted from eleven partners (BSC, CINECA, CSC, ECMWF, EPCC, FZJ, HLRS, IDRIS, LRZ, RZG and SARA) from seven European countries (Finland, France, Germany, Italy, The Netherlands, Spain and UK). The DEISA project started in 2004 and entered production mode in 2005.

DEISA Contact: Hermann Lederer, RZG, Garching , Germany (

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