72,271 research outputs found

    CMS software and computing for LHC Run 2

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    The CMS offline software and computing system has successfully met the challenge of LHC Run 2. In this presentation, we will discuss how the entire system was improved in anticipation of increased trigger output rate, increased rate of pileup interactions and the evolution of computing technology. The primary goals behind these changes was to increase the flexibility of computing facilities where ever possible, as to increase our operational efficiency, and to decrease the computing resources needed to accomplish the primary offline computing workflows. These changes have resulted in a new approach to distributed computing in CMS for Run 2 and for the future as the LHC luminosity should continue to increase. We will discuss changes and plans to our data federation, which was one of the key changes towards a more flexible computing model for Run 2. Our software framework and algorithms also underwent significant changes. We will summarize the our experience with a new multi-threaded framework as deployed on our prompt reconstruction farm for 2015 and across the CMS WLCG Tier-1 facilities. We will discuss our experience with a analysis data format which is ten times smaller than our primary Run 1 format. This "miniAOD" format has proven to be easier to analyze while be extremely flexible for analysts. Finally, we describe improvements to our workflow management system that have resulted in increased automation and reliability for all facets of CMS production and user analysis operations.Comment: Contribution to proceedings of the 38th International Conference on High Energy Physics (ICHEP 2016

    The Joyce Foundation's Transitional Jobs Reentry Demonstration: Testing Strategies to Help Former Prisoners Find and Keep Jobs and Stay Out of Prison

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    Each year, almost 700,000 people are released from state prisons, and many struggle to find jobs and integrate successfully into society. This policy brief describes an innovative demonstration of transitional jobs programs for former prisoners in Chicago, Detroit, Milwaukee, and St. Paul being conducted by MDRC

    The CMS Computing System: Successes and Challenges

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    Each LHC experiment will produce datasets with sizes of order one petabyte per year. All of this data must be stored, processed, transferred, simulated and analyzed, which requires a computing system of a larger scale than ever mounted for any particle physics experiment, and possibly for any enterprise in the world. I discuss how CMS has chosen to address these challenges, focusing on recent tests of the system that demonstrate the experiment's readiness for producing physics results with the first LHC data.Comment: To be published in the proceedings of DPF-2009, Detroit, MI, July 2009, eConf C09072
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