GMAP—Grid aware Monte—Carlo Array Processor

The Monte-Carlo Array Processor(MAP) has been designed using commodity off the shelf (COTS) items to provide the CPU requirements of full event simulation for the LHC experiments.The solution is however completely general,so and CPU intensive application with limited input requirements can be run on the system.Operating control software has been written to manage the data flow oiver the 100 BaseT ethernet connecting the 300 nodes(400 MHz PII‘s) to the 6 master control nodes 700 MHz PIII‘s each with 500Gb of disk),Upgrade to 1000 nodes is plkanned.Job control software that allows the user to run the same job on all nodes,whilst allowing for small differences in initialisation parameters between nodes has also been written.GMAP is the GRID aware MAP control software,This allows remote job preparation and submission using globus toolkit for authentification and communication.The software will be available and opens the possibility for doing massive Monte Carlo production over several remote MAP sites simultaneously.