From Web to Grid building the next IT

From Web to Grid… …building the next IT revolution

The Grid. PP Project www. gridpp. ac. uk Grid. PP is a collaboration of Particle Physicists and Computing Scientists from the UK and CERN, who are building a Grid for Particle Physics. History… Grid. PP will deliver the Grid software (middleware) and hardware infrastructure to enable testing of a prototype of the Grid for the Large Hadron Collider (LHC) project at CERN of significant scale. The Grid. PP project is designed to integrate with the existing Particle Physics programme within the UK, providing resources for LHC experiments ALICE, ATLAS, CMS and LHCb and the US-based experiments Ba. Bar, CDF and D 0. The infrastructure for the LHC experiments is organised in a tier structure. This prototype structure is illustrated by: 1. The RAL Tier-1 centre; and 2. Scot. GRID, as an example of a Tier -2 centre. Prototype middleware is developed in the UK as part of the EU Data. Grid project and is illustrated by: 1. OPTOR which optimises requests for replicated data, starting from peer to peer protocols; 2. R-GMA used to access information services essential to Grid operation; and 3. Grid. Site used to update the Grid. PP central web service using Grid certificate authentication. Applications development is illustrated by: 1. Bar - monitoring, data location, job submission and job retrieval are integrated into a system to analyse physics data. 2. LHCb - distributing computing and