Henri Bal Vrije Universiteit Amsterdam vrije Universiteit Our

Henri Bal Vrije Universiteit Amsterdam vrije Universiteit

Our Grid Adventures on DAS-2, Grid. Lab and Grid'5000 • DAS-2: homogeneous Computer Science grid + “A grid that works’’ + Ideal for clean measurements - Bad for heterogeneous or long-latency experiments • Grid. Lab: ad-hoc testbed for one EC project + Useful for heterogeneous experiments - Small-scale, unstable • Grid’ 5000: large-scale French CS grid + Excellent for large-scale experiments - Bad connectivity to outside world (DAS-2)

Are experimental Grid platforms useful? q Some DAS-2 (2002 -2006) statistics: • 1 M€ investment (5 Myrinet clusters, 200 nodes) • > 200 users from many universities, 25 Ph. D. theses • Major incentive for VL-e (Virtual Laboratory for e-Science) initiative 20 M€ government funding - VL-e was major incentive for Big-Grid (~ 30 M€) • Funding for DAS-3 (Aug. 2006) • Collaboration DAS-3 /SURFnet: 80 Gbs optical network • Collaboration with Grid’ 5000: towards a European scale => DAS has a major impact on Dutch computer science

What is the experimental scope? • Essential to distinguish between: - Experimental grids for Computer Scientists - Proof of concept environments for application scientists - Production grids (with massive data storage) • In plain Dutch: DAS / VL-e Po. C / Big-Grid • Computer Science grids are needed to: - Do clean experiments with reproducible results - Optimize utilization degree < 20% - Be able to change everything (OS, network protocols)

Is there room for an international testbed? • Need large-scale systems - E. g. , for research on P 2 P computing, algorithms, programming systems, communication protocols, etc. • There are many collaborations that may boost an international testbed - NL: ASCI school DAS-1, DAS-2, DAS-3 - EU: Core. GRID No. E …. .