INTERACTIVE GRID ACCESS WITH MPI
SUPPORT USING GRIDSOLVE ON GLITE-INFRASTRUCTURES
Torsten Hopp (1), Marcus Hardt (1), Nicole Ruiter (1), Michael Zapf (1), Goncalo
Borges (2), Isabel Campos (3), Jeús Marco (3)
1
2 Laboratório de Instrumentacao
de Física Experimental de Partículas (LIP), Lisbon
3 Instituto de Física
de Cantabria (IFCA), Santander
ABSTRACT: Grid
infrastructures provide large computing resources for grand challenge
applications. The Interactive European Grid project developed mechanisms for
the interactive and MPI-parallel usage of these resources. This paper presents
in detail an interactive approach that allows API style communication with grid
resources and execution of parallel applications using MPI. The RPC API of GridSolve and the middleware gLite
are integrated by the software Giggle for resource allocation. Furthermore, we
describe the adaption of Giggle and GridSolve to
allow the remote execution of MPI applications on RPC basis. Performance measurements
are carried out to benchmark the solution. We can show an overhead of only few
seconds in contrast to a job submit via gLite, which can
take minutes. We find that our approach is mainly limited by the data transfer
rates to the different computing sites.