LDG: DataGrids for Lattice QCD

Dr. Dirk Pleiter
John von Neumann Institut für Computing (NIC) / DESY Zeuthen

As the need for computing resources to carry-out numerical simulations of
QCD formulated on a lattice has increased significantly, efficient use
of the generated data has become a major concern. To improve on this,
groups plan to share their configurations on a worldwide level within
the International Lattice DataGrid (ILDG). Doing so requires standardized
description of the configurations, standards on binary file formats and
common middleware interfaces. In this talk we will detail the requirements
for a ILDG, describe the problems and discuss the solutions.  Furthermore,
we will give an overview on the implementation of the LatFor DataGrid
(LDG) which will be one of the grids within ILDG's grid-of-grids. The
implementation of LDG is a common project of DESY (Hamburg/Zeuthen),
FZJ/ZAM (Juelich), NIC (Zeuthen/Juelich) and ZIB (Berlin).