1. www.gisela-grid.eu Grid Initiatives for e-Science virtual communities in Europe and Latin America DIRAC TEAM CPPM – CNRS DIRAC Grid Middleware

2. www.gisela-grid.eu DIRAC DIRAC project was initially developed for the LHCb Collaboration as a system for massive production of the simulation data in order to design and optimize the LHCb experimental setup –DIRAC integrates computing resources available at LHCb production sites as well as on the LCG grid –The principal idea is to group heterogeneous computing resources for various activities with minimal human intervention 2

3. www.gisela-grid.eu DIRAC Overview Now, DIRAC is a general-purpose Grid Middleware providing access to different kinds of distributed computing resources. It includes: –General Framework for building secure distributed computing systems –Powerful Workload Management System based on Pilot Jobs –Data Management System with native File Catalog providing access to standard Grid storage resources –Higher level services to automate massive payload creation and execution –Friendly Web and command line user interfaces 3

4. www.gisela-grid.eu DIRAC overview: key features Fault tolerance –Multiple levels of redundancy built in Modular extendable structure –Allow to easily build custom service necessary for specific applications Example extensions: –MPI for EELA –Amazon EC2 Cloud VM Manager for Belle Experiment 4

5. www.gisela-grid.eu DIRAC overview: basics WMS is based on the “Pull” paradigm coupled with the idea of the Pilot Jobs –Execution environment is checked and guaranteed –Easiness of incorporated various computing resources Central TaskQueue for users and production jobs –Apply VO policies in a single place –Different kind of schedulers can be used 5

6. www.gisela-grid.eu DIRAC overview: interfaces DIRAC GUI is web based interface build in JS Multiplatform and secured Mimicking the desktop application Short learning curve for users 6 DIRAC CLI is based on DIRAC API written in Python DIRAC API is used in external projects like Ganga

7. www.gisela-grid.eu DIRAC overview: performance DIRAC3 performance measured in the recent production and FEST’09 runs –Up to 25K concurrent jobs in 150 distinct sites 7

8. www.gisela-grid.eu Contact us Andrei Tsaregorodtsev atsareg@in2p3.fr Vanessa Hamar hamar@in2p3.fr http://dirac.in2p3.fr 8