LHCbComputing

CM document discussion

2

Clarifications, e.g. on trigger simulation

Made changes to text to hopefully clarify some of the questionsHow to iterate?

3

Work in Progress – e.g. Data Placement

Difficult to be precise aboutwork in progress, prefer tostay vague than make falsepromises

4

MDST.DST

m MDST.DST (was ALL.DST) intended to facilitate migration to MDSTo This is work in progresso Cost is temporary, will be removed when migration is

completeP Calling it “indifference” seems harsh

5

Cost of data preservation

6

Simulation

7

Simulation

m Two questions:o What are ideas for reducing LHCb simulation time

P Answer is improved use of transport cuts, adapt granularity of detector to precision required, do not simulate spillover events in detectors that are insensitive to it (Calo, Muon)

P Work in progress, and details too technical to be described briefly

o Common improvements in G4, vectorisation etc.P Indeed. Already described in common chapter. Does it

need to be expanded?

8

Resources estimates

m Estimates foe 2015 are now different from request just made to C-RSGo How do we ensure consistency?