21-27 March 2009
Prague
Europe/Prague timezone

Commissioning Distributed Analysis at the CMS Tier-2 Centers

23 Mar 2009, 08:00
1h
Prague

Prague

Prague Congress Centre 5. května 65, 140 00 Prague 4, Czech Republic
Board: Monday 067
poster Distributed Processing and Analysis Poster session

Speaker

Dr Alessandra Fanfani (on beahlf of CMS - INFN-BOLOGNA (ITALY))

Description

CMS has identified the distributed Tier-2 sites as the primary location for physics analysis. There is a specialized analysis cluster at CERN, but it represents approximately 15% of the total computing available to analysis users. The more than 40 Tier-2s on 4 continents will provide analysis computing and user storage resources for the vast majority of physicists in CMS. The CMS estimate is that each Tier-2 will be able to support on average 40 people and the global number of analysis jobs per day is between 100k and 200k depending on the data volume and individual activity. Commissioning a distributed analysis system of this scale in terms of distribution and number of expected users is a unique challenge. In this presentation we will discuss the CMS Tier-2 analysis commissioning activities and user experience. The 4 steps deployed during the Common Computing Readiness Challenge that drove the level of activity and participation to an unprecedented scale in CMS will be presented. We will summarize the dedicated commissioning tests employed to prepare the next generation of CMS analysis server. Additionally, we will present the experience from users and the level of adoption of the tools in the collaboration.

Summary

CMS has identified the distributed Tier-2 sites as the primary location for physics analysis. There is a specialized analysis cluster at CERN, but it represents approximately 15% of the total computing available to analysis users. The more than 40 Tier-2s on 4 continents will provide analysis computing and user storage resources for the vast majority of physicists in CMS. The CMS estimate is that each Tier-2 will be able to support on average 40 people and the global number of analysis jobs per day is between 100k and 200k depending on the data volume and individual activity. Commissioning a distributed analysis system of this scale in terms of distribution and number of expected users is a unique challenge.

In this presentation we will discuss the CMS Tier-2 analysis commissioning activities and user experience. The 4 steps deployed during the Common Computing Readiness Challenge that drove the level of activity and participation to an unprecedented scale in CMS will be presented. We will summarize the dedicated commissioning tests employed to prepare the next generation of CMS analysis server. Additionally, we will present the experience from users and the level of adoption of the tools in the collaboration.

Primary author

Dr Alessandra Fanfani (on beahlf of CMS - INFN-BOLOGNA (ITALY))

Presentation Materials