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LCG Applications Session

LCG Applications Session. LCG Launch Workshop March 12, 2002 John Harvey, CERN LHCb Computing Coordinator. LCG Applications Area. 09:00 Introduction (15' ) John Harvey 09:15 Applications Subproject (45' ) Torre Wenaus 10:00 Discussion (30' )

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LCG Applications Session

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  1. LCG Applications Session LCG Launch WorkshopMarch 12, 2002 John Harvey, CERN LHCb Computing Coordinator

  2. LCG Applications Area 09:00 Introduction(15' ) John Harvey 09:15 Applications Subproject(45' ) Torre Wenaus 10:00 Discussion(30' ) issues related to project organisation and execution 10:30 Coffee 11:00 Process for managing LCG Software(15' ) Fons Rademakers 11:20 Math Library Review(15' ) Fred James 11:40 Data Persistency(15' ) David Malon 12:00 Discussion(30' ) work programme, RTAGs, next steps

  3. RTAG WP WP WP WP WP LCG Organisation chart LCG Project Leader (LR) 4 Area managers (Applications - Torre Wenaus) LHC experiment liaison (4) Grid project liaison WP technical managers Project Overview Board 2 reps per LHC experiment Regional Centre Managers Reps from IT, EP LCG project leader Software andComputingCommittee(SC2) Project Leader ProjectExecutionBoard (PEB) Work Plan Definition

  4. Workflow around the organisation chart WPn PEB SC2 RTAGm SC2 Sets the requirements mandate PEB develops workplan Prioritised requirements ~2 mths requirements Updated workplan Project plan Workplan feedback SC2 approves the workplan PEB manages LCG resources Release 1 Status report time ~4 mths Review feedback PEB tracks progress SC2 reviews the status Release 2

  5. RTAG WP WP WP WP WP The LHC Computing Grid Project Work Areas Applications Support & Coordination Computing Systems Grid Technology Grid Deployment Project Overview Board Software andComputingCommittee(SC2) Project Leader ProjectExecutionBoard Work Plan Definition

  6. Applications Activity Areas • Application software infrastructure • physics software development environment, standard libraries, development tools • Common frameworks for simulation and analysis • Development and integration of toolkits & components • Support for physics applications • Dev, support of common software tools & frameworks • Adaptation of Physics Applications to Grid environment • Object persistency and data management tools • Event data, metadata, conditions data, analysis objects, ..

  7. Fulfilling LCG Project Goals • Prepare and deploy the LHC Computing Environment • Applications - provide the common components, tools and infrastructure for the physics application software • Computing system – fabric, grid, global analysis system • Deployment – foster collaboration and coherence • Not just another grid technology project • Validate the software by participating in Data Challenges using the progressively more complex Grid Prototype • Phase 1 - 50% model production grid in 2004 • Produce a TDR for full system to be built in Phase 2 • Software performance impacts on size and cost of production facility • Analysis models impact on exploitation of production grid • Maintain opportunities for reuse of deliverables outside LHC experimental programme

  8. Goals for Applications Area • Many Software Production Teams • LHC experiments • CERN IT groups, ROOT team, .. • HEP software collaborations – CLHEP, EDG, Geant4 , .. • External Software – python, Qt, XML, … • Strive to work together to develop and use software in common • Will involve identifying and packaging existing HEP software for reuse as well as developing new components • Each unit has its own approach to design and to supporting the development • Sharing in the development and deployment of software will be greatly facilitated if units follow a common approach • Recognise that there will be start-up costs associated with adapting to use new common products and development tools

  9. Perceptions of Common Projects • Resource managers • Resources are scarce, in particular manpower • Common projects are a good way to become more efficient • Experiments • Whilst may be very enthusiastic about long-term advantages …. • …have to deliver on short term milestones • Devoting resources to both will be difficult • Already experience an outflux of effort into common projects • Hosting projects in experiments excellent way of integrating effort • Technology groups • Great motivation to use expertise to produce useful solutions • Need the involvement of the experiments

  10. General Perceptions • Lessons need to be learnt from past experience • Everything non experiment–specific is a potential candidate for a common project • Success of LCG is fundamental to success of LHC Computing

  11. Goals of session • Introduce Applications Area Manager – Torre Wenaus • Agree on project scope • Elaborate the procedures for organising and managing execution of the project • Start to develop high-level work plan • Will hear status reports from three RTAGs • Discuss proposals for new projects which are preliminary and meant to provoke meaningful discussion • Define concrete next steps – set priorities • Small projects to demonstrate short-term success ? • Major projects with large pay-offs ? • New proposals will be submitted to the SC2 and subjected to the process already described • Expose ideas and solicit new input and feedback

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