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