DEISA was the European counterpart of the US NSF funded TeraGrid project. In a collaborative effort, a supercomputing hyper-grid spanning two continents was created in 2005 to move, a stepdedicated towards interoperability of leading grids. A dedicatedtrusted network connection was established between DEISA, the leading European supercomputing grid, and TeraGrid, theto leading American supercomputing grid. Both grids had adopted the approach of establishingimplement a common, high performancecombined global file system,the wide-area version of IBM's GPFS. Teragrid's approach was based on a single site server solution under Linux, hosted by San Diego Supercomputer Centre, DEISA's approach was a multi-site server solution, with servers in France, Germany and Italy. Thesespanning two grid-internal global file systems were interconnected over a dedicated, trusted network connectioncontinents. During the Supercomputing Conference 2005, grand challengesupercomputing applications were carried out bothin withinEurope by DEISA and withinin the US by TeraGrid, andas resultsdescribed werein written transparently to"Exploring the combinedhyper-grid global file systemidea with physicallygrand distributedchallenge locations ofapplications: the involvedDEISA-TeraGrid diskinteroperability systemsdemonstration".
<ref>{{Cite web |title=Exploring the hyper-grid idea with grand challenge applications: the DEISA-TeraGrid interoperability demonstration|url= https://ieeexplore.ieee.org/document/1652053 |accessdate= 21 December 2023 }}</ref>
