CMS Offline and Computing Project Status Plans by zmb20253

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									CMS Offline and Computing Project : Status & Plans


            Lucia Silvestris INFN-Bari


                Napoli, 14/02/07
                                 Outline

  Scope and organizational structure of the project
  Status : some highlights from 2006
  Plans for 2007:
      – Goals and Milestones
      – Offline Release Plan & Production
   Key tasks and manpower needs




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                                            CMS Organization Chart
                             Computing, Offline, Detector Performance Groups (DPG)

 Computing
                                                    Offline Coordination                    Commissioning & Run
Coordination
                            Common                        J. Harvey                              Coordination
M. Kasemman
                         Coordination &                  L. Silvestris                      T. Camporesi,D. Acosta
 P. McBride
                        Integration Tasks
                           I.Fish, NN

                                 Software Development                      Calibration/Alignment
        Facilities /                     Tools                                 O. Buchmuller
       Infrastructure             D.Lange, A.PFeiffer                            L. Malgeri
        Operations
     D. Bonacorsi, NN                                                                                      ECAL
                                                                 Fast Simulation
                                      Framework                                                            DPG
        Computing                                                 F. Beaudette
                                L Sexton-Kennedy, NN
      Commissioning                                                  P. Janot
                                                                                                           HCAL
        S.Belforte,                Data & Workflow               Reconstruction                            DPG
       F.Würthwein                  Management                     T. Boccali
                                    P. Elmer, NN                  S. Rahatlou
     Data Operations                                                                                      MUON
      C. Pauss, NN                    HLT and                       Simulation                             DPG
                                   DQM framework                    F. Cossutti
                                   E. Meschi, NN                     D. Elvira                          TRACKER
      User Support
                                                                                                          DPG
      Kati Lassila-                   L1 Software                 Analysis Tools
       Perini, NN                      J. Brooke                    C. Jones
                                        W. Sun                      L. Lista

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                Scope of the CMS Computing Project

 Much of the new organization is built on continuity
    – Changes are motivated by preparations for operations
    – Effective operations of data taking requires close coordination with
      Offline and Computing


 Scope of Computing
 The Computing Project is responsible for managing the
   computing infrastructure and for all operational aspects of
   CMS data processing activities.




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                    Scope of CMS Offline Project

 Coordinates release of all CMS Offline Software
 Core Software Programme: specialist software skills
     – Develops framework that implements common software services
       needed in all data processing applications
     – Delivers data and workload management tools, interfaces and
       monitoring services for the production system
     – Supports the development, optimisation, testing, release and
       distribution of CMS offline software
 Integration tasks: physics and software skills
     – provide oversight and integration framework for delivering detector
       subsystem software and high-level physics objects
     – Reconstruction, Simulation, Fast Simulation, Calibration & Alignment,
       Analysis Tools , L1 emulation s/w
 Offline discharges responsibility for integration, validation
 and delivery of releases using the Software Release Plan

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                        Status: Highlights from 2006
New framework
   – ~ 0.5 M lines of CMSSW code developed since April 2005
MTCC
   –   Supported readout, calibration, local reconstruction and visualisation of data
   –   components of Event Filter integrated with DAQ/Run Control system
   –   > 30M events; maximum rate of 200 Hz; transfer rate to CASTOR 20 MB/s
   –   parasitic stream to serve event display and Data Quality Monitoring consumers
CSA06
   – Simulation chain extensively validated in terms of robustness and performance
     (SVSuite); ~60M events generated
   – All main reconstruction components included
       • local, global, physics objects
   – Calibration/Alignment - tested ability to pull in constants from Offline DB
   – fully functional prototype of production system
       • WM: Tier 0, MC production system (ProdAgent), CMS Remote Analysis
         Builder (CRAB), which is used for submission of analysis jobs to the grid
         DM: successful integration of DBS, DLS, PhEDEx, FronTier, Dashboard
Feb 2007: major milestone for validation of CMSSW wrt ORCA

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                        Plans for 2007: Milestones

 End Feb: CMSSW validation complete
     – Physics-TDR Volume I recovered
 End May: MTCC3 & Commissioning tests
     – First Global Run foreseen; repeated on a monthly basis
 Mid June: HLT exercise complete
     – Full trigger table, algorithms, CPU
 Beg July: CSA07 Computing Offline and Analysis Exercise
     – 5-05 (June): Software complete - HLT, reconstruction, simulation,
       calibration & alignment, visualisation and analysis
 October 15: First physics papers prepared
     – Full analysis breakdown; details of how and what for each physics
       paper
 October 15: Offline and Computing ready for Pilot Run
     http://cms.cern.ch/iCMS/jsp/page.jsp?mode=cms&action=url&urlkey=CMS_OFFLINE

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                       Offline Release Plan & Production
  End Jan: 1_2_2
      – Complete Physics validation of CMSSW
      – Production of samples for HLT Studies (Geant4.7.1)
  Mid Feb: 1_2_3
      – Production of samples for Physics Studies (Geant4.7.1)
  End Feb : 1_3_0
      – all components needed for HLT exercise; no changes in geometry
      – Re-Reco processing with 1_3_x in March
  End March : 1_4_0
      –     Changes to geometry allowed; new/improved local reconstruction algorithms
      –     Improved DQM and HLT software; support for partial releases.
      –     Integration and commissioning tests with 1_4_x in May-June
      –     Production of SIMU + Digi events for CSA07 start end of April.
  Mid May : 1_5_0:
      – new/improved global reconstruction algorithms and calibration alignment
        algorithms
      – 1_5_x: Production of RECO and AOD for CSA07 can start mid June
      – 1_5_x: New cycle of integration and commissioning tests in July-August

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                    Offline Release Plan & Production
  Mid June : 1_6_0
      – complete calibration & alignment, visualization, analysis components for
        CSA07.
      – 1_6_x: Production of AlCaReco and Physics streams; T1-T2 involved
      – 1_6_x: New cycle of integration and commissioning tests in July-August
  Mid July : 1_7_0
      – new cycle with improvements/fixes
      – 1_7_x: New cycle of integration and commissioning tests August -
        November
  Beg Sept : 1_8_0
      – new cycle with improvements/fixes
      – Lesson learnt from CSA07 and from integration and commissioning tests
      – 1_8_x: New cycle of integration and commissioning tests August-
        November
  Mid Oct: 1_9_0
      – 1_9_x: Pilot Run


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                            Towards CSA07

  Need to demonstrate performance and capacity of CMS
  Data and Analysis Model at >50% of 2008 capacity and
  performance.
     – Aim to include DAQ and HLT
     – Aim for simultaneous functionality
     – Include functionality we didn’t include in the CSA06 scope
  Schedule: summer 2007




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                          CSA07 Goals: Increase Scale

 CMS demonstrated 25% performance in 2006. We have two more
 factors of 2 to ramp up before data taking in 2008
 The data transfer between Tier-0 and Tier-1 reached about 50% of
 scale
     – Very successful test, but some signs of system stress were visible
 Job submission rate reached 25%. Another factor of 2 will be possible
 with the current system
     – The next factor of two is less clear

 We plan another formal challenge in 2007
 A >50% challenge in the summer of 2007
     –   Extend the system to include the HLT farm
     –   Add elements like simulation production
     –   Increase user load
     –   Run concurrent with other experiments stressing the system



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            Key tasks and Manpower needs

               in Offline & Computing




14/2/2007           Planning and Milestones   L. Silvestris   19
                                    Databases

Variety of DB Subsystems                            Offline
                                                    Apps
    –   Construction DB
    –   Equipment Mgt DB                                           Tier 0         Offline
    –   Geometry DB                                Offline       Conditions
                                                    ORCOF                            ‘objects’
    –   Configuration DB
    –   Conditions DB
                             HCAL
    –   Bookkeeping DB (DBS/DLS)                                                      ‘objects’
                                                     HLT
Figure shows OMDS /ORCON /                          ORCON
                                                                 Conditions
   ORCOF deployment model
    – All critical CMS data should                 Online                          Online
                                                                 Monitoring,
      reside in this set of databases               OMDS         Configuration
Create a Core Database Team to plan                                                    ‘tables’
evolution of DB systems together                    PVSS         Monitoring,
                                                                 Configuration
with subsystems
                                                 Conditions=calibration,alignment,
                                                   slow controls data

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                         Core Database Team

 Main responsibilities are to :
     – increase commonalities between subsystems
     – implement and maintain common services and policies
     – manage common schedules and milestones
 Need new effort to setup a core team comprising:
     – A DB coordinator : physicist profile (physics data, analysis)
     – Core DB software specialists : C++ and SQL developer profile
     – Operations team : DBA profile
        • co-operate with IT+ other LHC experiments to establish a 24/7
          service




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                        Calibration and Alignment
  Delivers executable for prompt calibration and alignment task and for
  the export of constants to the HLT
  Provides forum for discussing global strategies and policies for driving
  new calibration updates
      – Works closely with the Detector Performance Groups
  It provides mechanisms for accessing databases and migrating data
  between them in collaboration with Online Project
  Specific tasks requiring new effort:
      - develop the general alignment strategy utilizing the global alignment
         approaches (e.g. Millepede II)
        • How to align >100K parameters with global alignment
      – implement global alignment approaches into the work and data flow of
         prompt alignment/calibration at Tier 0
      – work and dataflow management for alignment at Tier 1/ Tier 2 centers
      – establish offline monitoring of online calibration constants
        • requires development of new interface in CMSSW



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                                HLT and DQM

 Provides infrastructure for executing HLT algorithms in the Filter Farm
 New effort needed for commissioning of detector code in Event Filter
     – organize and lead online sessions with subdetectors to validate code
     – prepare and document validation procedures
     – write documentation for shifters
     – need to understand many aspects of reconstruction code plus implication of
       online operation (access to resources/robustness issues)
     – become one of the "experts on call" for the filter farm
 New effort needed for developing Conditions DB access infrastructure
     – Collaborate to tests of various options for access to calibration data from
       Filter Farm (direct oracle access, frontier/squid,..)
     – This task needs to converge rapidly on a viable scheme to be used in the
       Filter Farm in 2008. Once the solution is identified, the person would
       become responsible for the deployment/maintenance of the required
       infrastructure in Cessy. Depending on the solution chosen, this may be in
       collaboration with external teams
 Ideally should be resident at CERN for these tasks


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                                 HLT and DQM
DQM provides the monitoring environment for safe operation of the HLT
software and Filter Farm
   – DQM components are also used in offline monitoring
DQM system essential for the commissioning and operation of CMS
   –   Work with sub-detectors to modularise and make more uniform DQM code
   –   Work on commissioning aspects of DQM in online environment
   –   Manage technical aspects of DQM shift organization/documentation/training
   –   Liaise with Commissioning and Run Coordination
         • DQM half-day workshop in next CMS Week
DQM development work also required
   – Implementation of history plots and development / adaptation of data
     management tools for DQM data
   – Implementation of a "DQM catalog" database
Effort urgently needed to work on the DQM GUI
   – Component of IGUANA (event display) - debug tool for offline simulation and
     reconstruction, data analysis, test beams, and detector monitoring

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                              Reconstruction

  Delivers executables for event selection in HLT and prompt
    reconstruction in the Tier0 (and re-R in Tier 1)
  Oversees development and manages integration of all
  reconstruction code and RECO data formats
      – local, global, high-level physics objects
  Tasks requiring effort
      – certifying releases used for physics, organizing/testing/
        integrating
      – following the nightly builds; check what went ok/not ok every day,
        and help developers to fix problems
      – make performance optimisation studies - cpu, memory footprint;
        act as a contact person to the Performance Task Force




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                              Framework

  Provides the necessary services for building CMS data
  processing applications (reconstruction, analysis)
      – Module scheduling, event setup, provenance tracking, EDM…
  Effort is concentrated at FNAL - people based in Europe
  (preferably CERN) are needed to work closely with HLT and
  Tier 0 projects, especially during commissioning
  Development effort is needed for several tasks
      – Geometry infrastructure; improvements to the DDD ( XML-based
        detector description language) and regression testing and
        validation of the CMS geometry at every release
      – Infrastructure code for the Calibration and Alignment databases
      – Development and maintenance of the event setup and parameter
        set services




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                               Simulation

  Delivers full CMS simulation program
     – framework that interfaces to geometry, event generators, and
        Geant4
     – Performs tuning and validation, profiling and optimisation studies
     – Oversees production workflow of MC data samples
  Most urgent tasks requiring effort
     – improvement/maintenance of Magnetic Field interface to Geant4,
        implementation of new field maps, development of validation code
     – work on local magnetic field management is needed to speed up
        full simulation. Needs significant Geant4 expertise.
     – GFLASH infrastructure, implementation and tuning of EM and
        HAD showers to full simulation.
     – develop simulation tools/features requested by users, interact
        and support users



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                       Software Development Tools
  Prepares and maintains the software environment for development,
  release, distribution and deployment
  A major task requiring effort relates to development of the Software
  Validation Suite (SVSuite) for certifying new releases of CMSSW
  applications
      – involves communication with all groups involved: now mainly simulation,
        reconstruction,...in the future other groups doing trigger, calib/align, fast
        simulation, MC/data comparison packages
      – Integration/testing of all packages into the MC Production environment
      – Communication with computing about production of RelVal samples and
        with the rest of the software groups on configuration file availability
      – Coordination of the software validation process at the time of a release.
      – Integration of DQM tools into SVSuite: histogram transfer to server,
        web publishing, implementation of macros as DQM client programs




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                     Data and Workflow Mgt Tools

 Development of tools used in production system
     –   Data management tools: DBS and DLS, PhEDEx, Frontier
     –   Workload management tools: CRAB, ProdAgent system,Tier 0
     –   Monitoring tools, CMS Dashboard
     –   Web interfaces to enhance end-user usability
 Tasks requiring effort
     – a developer to work on the Tier 0 workflow system, and its integration
       with the HLT and Data Management system
     – a developer to join the team working on the production system,
       including various features and improvements:
       https://twiki.cern.ch/twiki/bin/view/CMS/ProdAgentDevPlanCurrent
     – A developer to work on web interfaces to the WM/DM tools




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                                Fast Simulation

 Provides a framework for fast simulation and reconstruction
     – interaction of particles in the tracker are simulated and shower
       parametrizations are used in the calorimeters
     – standard reconstruction algorithms used for track reconstruction, b-tagging,
       clustering, jets etc.
 Tasks requiring effort
     – simulation of the L1 calorimeter trigger; the standard L1 emulator cannot be
       used, since it relies on the digis which are not available in the FastSimulation;
       a parametrization of the L1 response on trigger tower basis has to be
       developed
     – simulation of the hits in the muon detector; the path and the energy deposit of
       the muons in the calorimeters have to be computed
     – precise tuning of the fast simulation using real (testbeam) data
     – detailed comparison of the Fast Simulation output w.r.t. the Full Simulation
       output in a wide range of energy



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                              Analysis Tools

  Provide a software suite integrated with the framework
    that facilitates data and physics analysis
  Organise and manage release of libraries developed in
    physics analysis projects
  Provide frameworks that support batch and interactive
    analysis
      – FWLite, Iguana, Python, PROOF, ROOT
  Effort needed for all parts of the work programme including
      – porting the FWLite based code to Microsoft's VC++ and work on an
        Windows 'friendly' installation
      – creating a 'provenance viewer' for EDM ROOT files which runs nicely
        in ROOT




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                           Level 1 Software

The L1 Trigger offline software includes packages that provide
bit-level emulation of the trigger electronics, along with tools
for interpreting, monitoring and analysing L1 data.
A further task would be to figure out exactly how the HLT
Supervisor will communicate with CMSSW modules(e.g.
through EventSetup).
Another project would be to develop prototype offline DB schema
for emulator configuration constants.




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                              Integration

  N.N. for
  Integration I.Fisk, N.N.
  Organize the program of work for integrating the software
  infrastructure (production tools, applications) and data handling
  systems (facilities, data operations) in preparation for data taking

  Senior Physicists/Computer Scientist with computing expertise,
  operations experience and organizational talents
  Presence at CERN: 50%, (I.Fisk is 25% at CERN)
  coordination of remote activities from remote (this was done by
  M.Ernst)




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                         Data Operations


  N.N. for
  Data Operations C.Paus, N.N.
  Responsible for data processing and executing production
  workflows.
  Overall responsibility to ensure that detector corrections,
  calibration and alignment constants are readily applied at
  prompt processing and distributed.

  Senior Physicists with computing expertise and operations
  experience and organizational talents
  Presence at CERN: 50%, (C.Paus is >75% at CERN)
  coordination of remote activities from remote is feasable

14/2/2007                 Planning and Milestones     L. Silvestris   34
                             Facility/Infrastructure

  N.N. for
  Facility / Infrastructure Operations D.Bonacorsí, N.N.
  Responsible to provide and maintain a working distributed computing
    fabric.
       - consistent working environment for the Data operation and the users
       - Coordination of facilities operation, resource management
       - liaison to external projects and organisations involved in this process.


  Physicist/Computer Scientist with strong systems and grid systems
     expertise
  - Presence at CERN required 100% (D.Bonacorsi is 50% at CERN)




14/2/2007                          Planning and Milestones                L. Silvestris   35
                                     User Support

 N.N. for
 Provide user support for analysis K.Lassila-Perini, N.N.
 Helpdesk, triaging of problems
 Provide guidance to user for trouble shooting analysis jobs
 Organize and provide documentation
 Organize tutorials
 Define what is need for users to monitor and track jobs and data in the system
 User accounts and VO management

 Coordination based at CERN
    –   team based at CERN
    –   involvement of SW developers
    –   involvement of Physicist teaching how to perform analysis
    –   user support front-end person at each T1/T2

 Physicist or Computer Scientist with good data analysis experience, writing skills
     to assist users
 - Presence at CERN: up to 50% (K.Lassila-perini is 100% at CERN)



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Back-up
                    Relationship to Run Coordination
  Commissioning will involve large scale tests of data- and work-flow in
  steps up to full scale operation in 2008
  Run coordination is making a plan for the commissioning and operation of
  the CMS detector
  Effective operations of data-taking requires close coordination with
  Offline and Computing
  Weekly to daily interaction with contacts, in particular
      – DQM - monitoring, error diagnostics
      – HLT - operation of online filter software
      – Calibration and alignment, derivation of constants and population of
        database
      – Reconstruction - identify and solve problems, ensure quality of data
  Integration tasks are critical component of commissioning and run
  activities (releases, databases)




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Meetings
                      Weekly Offline Meeting Schedule

Start Time   Monday        Tuesday           Wednesday           Thursday          Friday
   08:30
   09:00
   09:30                   Plenary/
   10:00                                                                          Joint
                           Physics
   10:30                                                                       Commissioning
                          Detectors                                               Offline
   11:00                    Offline
   11:30
   12:00
   12:30
   13:00
   13:30
   14:00        L1
   14:30 Coordination                                                        Commissionin
   15:00                                       Joint                             g
                         Reconstructio
   15:30 Task Forces/                       Comp/Off L2
                          n/ Analysis
   16:00    Production
                             Tools
   16:30      Tools/
                                                                COMPUTING     Calibration &
   17:00 Framework &     Simulation/           Online
                                                                               Alignment/
   17:30     SW Devel    Level1 SW/           Selection
                                                                                HLT&DQM
   18:00       Tools         Fast
   18:30                  Simulation
   19:00
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                                   Physics Days

Start Time    Monday        Tuesday         Wednesday           Thursday             Friday
   08:30
   09:00
                                           Reports from
   09:30
                                               DPGs,
   10:00                                                        Analysis
                                           alignment &
   10:30                                                        Groups
                                            calibration,
   11:00                                                     presentations
                                          commissioning
   11:30
                                               news
   12:00
   12:30
   13:00
   13:30
   14:00                                                        Plenary
   14:30                                                        Physics
   15:00                                    POG and            Meeting
              Common
   15:30                 Joint Offline-     analysis            (group
              Offline-
   16:00                    Physics         meetings          highlights,
             Computing
   16:30                   meeting                             analysis
              meeting
   17:00                                                      approvals)
   17:30                                    Physics
   18:00                                  Coordination
   18:30                                    Meeting


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            Joint Offline/Physics Meetings during Physics Days

  6 Feb 6-8 Feb
  27 Mar 27-29 Mar
  24 Apr Physics Trigger Week
  22 May 22-24 May
  11-15 Jun Annual Review
  10 Jul 10-12 Jul
  31 Jul 31-2 Aug
  28 Aug 28-20 Aug
  23 Oct Physics Trigger Week
  13 Nov 13-15 Nov

                      Offline and Computing Weeks
  16 Apr Offline & Computing Week
  15 Oct Offline & Computing Week



14/2/2007                    Planning and Milestones         L. Silvestris   42
                                         CMS weeks


          Monday          Tuesday              Wednesday           Thursday            Friday
8:30                     Sub-Detectors           Plenary             Plenary           Physics
9:00     Sub-Detectors     Parallel          Technical Coordn       Computing         Plenary II
9:30       Parallel                                                and Softw are
10:00
10:30
11:00     OPENING
11:30     SESSION
12:00
12:30
                                                                                         CB

14:00                                            Plenary            Physics
14:30                                         Commissioning         Plenary I
15:00
15:30          PM
16:00         Reports
16:30
17:00
17:30
18:00                                               FB             Special MB
18:30
19:00


  14/2/2007                              Planning and Milestones                   L. Silvestris   43
              CMS Week Meetings 26 Feb -2 Mar

  Plenary Offline and Computing Meeting on Thursday
  afternoon instead of Thursday morning

  Parallel session can be done during Tuesday full day,
  Wednesday and Thursday morning

  CMS Tutorial on Tuesday morning




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Schedules
                          Offline/Production Schedule
                  Releases/Milestones                              Production Activities

 End Jan : 1_2_1: Production version for HLT Studies      1_2_1: HLT Production and Physics
 End Jan : 1_2_2: Version to be used for Physics          analysis Production Feb-March. Mainly
 Validation of CMSSW                                      Generation and Simulation step.
 Mid Feb : Complete Physics Validation of CMSSW

 End Feb : 1_3_0: all components needed for HLT           1_3_x: re-reprocessing for HLT in
 exercise; no changes in geometry; Geant4.7.1             March
 End Feb : 1_3_0_Geant4.81 all components needed for      1_3_x: Production of Physics Samples
 HLT exercise; no changes in geometry; Geant4.7.1         (30M/mth) Reco Step in March
                                                          1_3_x_geant4.81 Validation samples


 End March : 1_4_0 : Changes to geometry allowed.         1_4_x: HLT test in April
 new/improved local reconstruction algorithms             1_4_x: Integration and Commissioning
 Improved DQM and HLT SW.                                 tests in May
 This release should resolve dependencies problems in a   1_4_x: Production of SIMU end of April
 way that we can release Online releases without Geant4
 components.




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                         Offline/Production Schedule
                  Releases/Milestones                              Production Activities

   Mid May : 1_5_0: new/improved global reconstruction    1_5_x: Production of RECO and AOD
   algorithms and calibration alignment algorithms        can start mid June T0 Production for
                                                          CSA07

                                                          1_5_x: New cycle of integration and
                                                          commissioning tests in July-August



   Mid June : 1_6_0 – complete calibration &              1_6_x: Production of AlCaReco and
   alignment, visualization and analysis components       Physics streams. T1-T2 involved
   needed CSA07.                                          1_6_x: New cycle of integration and
                                                          commissioning tests in July-August



   mid July : 1_7_0 - new cycle with                      1_7_x: New cycle of integration and
   improvements/fixes                                     commissioning tests August-
                                                          November
   This version will need also an Online Release
   Further updated on Geometry and Data format
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                        Offline/Production Schedule

                Releases/Milestones                             Production Activities
   Beg Sept : 1_8_0 - new cycle with                   1_8_x: New cycle of integration and
   improvements/fixes                                  commissioning tests August-
   Lesson learnt from CSA07 and integration and        November and Pilot Run.
   commissioning tests


   Mid Oct: 1_9_0                                      1_9_x: Pilot Run




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            Updated Milestones for LHCC




14/2/2007           Planning and Milestones   L. Silvestris   49

								
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