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ATLAS/ARDA LCG Demo

ATLAS/ARDA LCG Demo. ATLAS Distributed Analysis. ATLAS strategy. Jobs to production system Access to all ATLAS resources Jobs to each grid infrastructure LCG – Resource Broker OSG – PANDA Nordugrid – ARC Middleware GANGA User Interface Project

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ATLAS/ARDA LCG Demo

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  1. ATLAS/ARDA LCG Demo ATLAS Distributed Analysis

  2. ATLAS strategy • Jobs to production system • Access to all ATLAS resources • Jobs to each grid infrastructure • LCG – Resource Broker • OSG – PANDA • Nordugrid – ARC Middleware • GANGA User Interface Project • Seamless access to all possibilities for the users

  3. Work in progress • Various parts have reached different status of usability • Two aspects will be demonstarted • Selection based on what was practical to demonstrate • Production system on LCG • Real user analysis job • Z→ • GANGA • Creation of example job on the fly • tt analysis

  4. Prodsys Architecure Prodsys DB (Oracle) ATCOM Lexor Resource Broker LCG Sites Eowyn CondorG Executor CondorG Negotiator

  5. Features for Distributed Analysis • Support for user defined jobs • Part of the new release • Access to the job database by Atcom using grid authentication • As of today jobs are still run under the certificate of a manager

  6. Workload Management • CondorG • Negotiator at CERN and in Canada • LCG Resource Broker • New Lexor available • Under test right now • A version supporting bulk submission will be available soon

  7. Data management • New DMS DQ2 not yet fully deployed • Intermediate solution • Central LFC lfc-atlas-test • Also used for small productions • Plan to move to DQ2 asap

  8. Data • Merged Rome AODs • 2700 files • 150 GB • Has been replicated at several sites • PIC, IFIC Valencia • CNAF, Milano, Rome, Napoli, Frascati • ASGC Taipeh • FZK (planned) • Mixture of T1 & T2 according to ATLAS Computing model

  9. Demo • Demonstrate of the ATCOM UI • “Real” user analysis job performing an analysis of Z→

  10. GANGA: Single frontend for multiple systems

  11. GANGA Architecture

  12. Demo • Demonstrate GANGA CLI • Integration with build environment • Use GANGA to define a job on the fly • ttbar example • Submit it to LCG

  13. Timescales • Currently systems are under test by a small number of users • All systems aim for public access to the tools for early next year

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