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Computing R&D for LHCb upgrade

Computing R&D for LHCb upgrade. Computing for LHCb upgrade detector is an order of magnitude larger scale than LHCb today c.f. Atlas or Alice today Computing resources scarce, unlikely to scale Need R&D to meet the challenge Examples of R&D:

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Computing R&D for LHCb upgrade

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  1. Computing R&D for LHCb upgrade • Computing for LHCb upgrade detector is an order of magnitude larger scale than LHCb today • c.f. Atlas or Alice today • Computing resources scarce, unlikely to scale • Need R&D to meet the challenge • Examples of R&D: • Evolution of physics software framework (Gaudi) to support multi-core CPU, GPU etc. • c.f. PH-SFT initiatives • Large database technology • Support order of magnitude more metadata • Support likely changes to computing model – e.g. data mining • Scale production system (Dirac) to order of magnitude more jobs/files • Explore new ideas for computing model • e.g. dynamic data placement, c.f. WLCG activities

  2. PH-LBC offline and LHCb upgrade • Current PH-LBC offline computing manpower fully committed to support LHCb data analysis • Offline production activities • Software consolidation and optimisation activities • Physics software coordination • Including for use in LHCb upgrade studies • None of above likely to reduce during 2013-2014 shutdown • Must take leading role in upgrade R&D • LHCb computing expertise concentrated at CERN • Junior manpower (students, young postdocs) available in the collaboration, but cannot work in isolation • Very few experienced computing staff who can supervise them • Long term interest of the group • Would require strengthening of PH-LBC staff • Several LDs to lead new R&D activities • And share existing support activities so that existing staff can also participate effectively in R&D

  3. Needed manpower • Existing manpower fully committed to coordinating computing operations of existing experiment • Injection of new manpower needed to share coordination of operations activities and allow CERN group to take leading role in R&D • Unlikely that this new qualified manpower can be found within existing collaboration • On the assumption that no help is forthcoming from collaboration: • CERN group would need a minimum of 2 new LDs from 2013 to coordinate upgrade R&D • Would bring the LBC offline team to the same strength as it was in ~2002, when we were developing the Gaudi framework but did not have to support a running experiment. • Would also need to increase the student and applied fellow allocations, by ~2 students and ~1 fellow.

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