1. Status and Plans of the Spanish ATLAS
TIER-2 ( ES-ATLAS-T2)
WORKSHOP on ‘GRID Computing and e-Science: Data Analysis of ATLAS
Experiment and Medical Physics’
Tier2 Team: G. Amorós, A. Fernández, S. González de la Hoz, A. Lamas, E. Oliver, J. Salt,
J. Sánchez, M. Villaplana
Presented by : José F. Salt Cairols
4-6 th October 2010

2. Overview 1.- The Spanish ATLAS Tier-2
2.- The Role of the ES-ATLAS-T2 within the
ATLAS Computing Model
3.- Response of the ES-ATLAS-T2 at the
start of LHC
4.- The ES-ATLAS –T2 and the Integration of the Morocco’s Tier-3
5.- Conclusions and perspectives

3. 1.- The Spanish ATLAS TIER-2
The ATLAS distributed TIER-2 is conceived as a Computing Project for ATLAS experiment. Its main goals are:
Enable Physics Analysis for all ATLAS Users and, in particular, for the Spanish ATLAS users
Continuous production of ATLAS MC events
To contribute to ATLAS + LHC Computing Common Tasks
Sustainable growth of infrastructure according to the scheduled ATLAS ramp-up and stable operation
To provide the User Support for the Spanish ATLAS physicists
List of ‘Tier-2’ related projects in chronological order:
‘Acción Especial’ ( )
LCG- oriented project ( )
ATLAS Tier-2 project (Development & construction):
(2 years)
ATLAS Tier-2 project (phase I): ( 3 years )
ATLAS Tier-2 project (phase II): (3 years)
I + D
Service
Infrast.
Recently awarded

4. IFAE UAM IFIC 14 FTE CPU = 10.400 HS06 Disk = 1045TBytes
Universidad Autónoma de Madrid (Madrid)
Instituto de Física de Altas Energías (Barcelona)
Instituto de Física Corpuscular (Valencia)
IFAE
Deployed Equipment:
CPU = HS06
Disk = 1045TBytes
UAM
IFIC
Human Resources:
14 FTE
(as of Sept. 2010)

5. Update of the CPD 2009 has been a tough year:
IFIC a big update of the CPD
Present view of the IFIC CPD
Details of the
Renovation work of the
IFIC CPD (June 2009)
Based in SUN
X X4540
LUSTRE V1.8
View of the Storage Resources

7. Table : List of the active Tier-2 personnel and the commitments (as of 31 May 2010)
The underlined names are payed by the project funds
Names with asterisc(s) are contracted by the Program of Support Techician (Tecnico de Apoyo).
A. Lamas is not included in the Scientific members of the project

9. Framing the Tier-2 project in ATLAS
UAM:
Construction and Commissioning of the ATLAS Electromagnetic End Cap Calorimeter.
Calibration of the ATLAS Electromagnetic Calorimeter.
ATLAS Physics: Higgs search through 4 leptons decay mode
IFIC:
Construction and Commissioning of the ATLAS Hadronic Calorimeter (TileCal)
Construction and Commissioning of the ATLAS SCT-Fwd.
Alignment of the Inner Detector
ATLAS Physics: b tagging algorithms for event selection; MC studies of different process beyond SM ( Exotics, SUSY, Little Higgs and Extra Dimensions models); Top Physics, Higgs Searches.
IFAE:
Construction and Commissioning of ATLAS Hadronic Calorimeter (TileCal)
Development and Deployment of the ATLAS High Level Trigger: second level Tau trigger software, operation (Event Filter Farm); commisioning of event selection software, tau & jet trigger.
ATLAS Physics: TileCal Calibration, Reconstruction and Calibration of Jet/Tau/Missing Transverse Energy, SUSY searches, Standard Model processes, Charged Higgs.

10. 2.- The role of the ES-ATLAS-T2 within the ATLAS Computing Model
> 90%
Reliability = Uptime / (Total time - Scheduled Downtime - Time_status_was_UNKNOWN)
Prob (1 site down) ≈ 0.05
Prob (3 sites down) ≈ =
Availability = Uptime / (Total time - Time_status_was_UNKNOWN)

11. Evolution of the T2 Resources
April’2010

12. Estimated resources since 2010 onwards (numbers are cumulative):
Evolution of ALL ATLAS T-2 including the pledged already delivered plus the
Estimated resources since 2010 onwards (numbers are cumulative):
Año
2010
2011
2012
2013
CPU(HS06)
240000
278000
295000
342200
Disk (TB)
20900
37600
44000
66000
Spanish ATLAS T-2 assuming a contribution of a 5% to the whole effort:
New
Project
Pledges
Año
2010
2011
2012
2013
CPU(HS06)
12000
13900
14750
17110
Disk (TB)
1045
1880
2200
3300
2012: Preliminary
Estimates
Prov. By
ATLAS
2013: Preliminary
Estimated
By us
2010: Official
requirements
2011: Official
requirements

13. ES-ATLAS-T2 Activity Groups:
SA: System Administrators
CO: Cloud and T2 Operation
T3 : Support T3
US: User Support
AT: ATLAS Computing Tasks
PM: Operation and Project Management
User Support (US)
The number of ATLAS end-users is ramping-up fast
Physicists have different profiles
T2 project provide the Support to he Spanish ATLAS end-users
The US include:
Certificates,
Submit jobs
File transfer
Answer questions about ATLAS
Software
To solve problems using the T2 and T3 infrastructure
To organize tutorials

14. Support to T3
The same T2 sites host the ATLAS physicists who need an infrastructure to perform the last stages of the Physics Analysis
Experience of the T2 staff is being used to build and maintain such an infrastructure (Tier3) in a proper way to fullfill the requirements
The technical work includes the design and maintainance of a storage system, of a GRID-type computing facility and of a system for paralles processing ( like PROOF)
All these systems must be compatible with the T2

15. 3.- The Response of the ES-ATLAS-T2 at the start of LHC

16. Distributed Analysis
Analysis on collision events performed on the ES-T2 resources fall in two categories:
Detector and Combined performance
Physics Analysis
Typical Analysis
First stage is to submit a job to the Grid (Distributed analysis)
The output files will be stored in the corresponding Tier2 storage
Later the output files can be retrieved for a further analysis on the local facilities of the institute.
ATLAS distributed analysis in the ES-T2
Two front-ends were used: Ganga and Panda
Differ in the way they interact with the user and the Grid resources

17. Data Management Tier0 CERN Tier1 10 centers Tier2 several centers
Raw
3 replicas
Raw
ESD
ESD 10 replicas
dESD
AOD
AOD 13 replicas
dAOD

18. Access to the data Jobs run where the data are located.
Tier2
Jobs run where the data are located.
User can ask for a replica in other site.
Dataset
Job
Tier2 'A'
DaTRI
Dataset
Tier2 'B'
Replica
Job

19. Detector and combined performance
ATLAS Analysis Types
Tier1/2
Analysis with different inputs
Output from storage site to user local facility (DQ2 or DaTRI)
Raw
ESD
dESD
Job
Ntuple
Ntuple
Ntuple
Detector and combined performance
Tier1/2
AOD
dAOD
Job
DPD
DPD
Physics Analysis

20. 4.- The ES-ATLAS-T2 and the integration of the Morocco’s T3 (Mo-T3)
From the point of view of the Infrastructure: to establish and maintain a Tier-3 in Morocco supported by CNRST
The NREN is also maintained by the CNSRT (Marwan)
Period of task identification (February-June 2010).
it is a stand-alone T3 with important differences wrt the IFIC Tier-3
Steps in the integration of the Morocco’s T3
Evaluation of the usage of the Morocco’s T3
Memorandum of understanding for the collaboration between the ES-ATLAS-T2 snd the M-T3
To ask for the inclusion of the M.T3 in the ToA
To check the advantages obtained

21. 5 Tier-2 Tier-1 small desktops RAL centres portables IN2P3 Tier-3 FNAL
USC
NIKHEF
Krakow
Legnaro
IFAE
Taipei
TRIUMF
IFIC
UAM UB
IFCA
CIEMAT
MSU
Prague
Budapest
Cambridge
Tier-1
small
centres
desktops
portables
RAL
IN2P3
Tier-3
FNAL
CNAF
FZK
PIC
ICEPP
BNL
UAM-T3
UAM-T3
IFIC-T3
IFAE-T3
Morocco-T3 5

22. Main objective: to include the Morocco T3 in the ‘Tiers of ATLAS’:
‘Tiers of ATLAS’: Joint effort for managing the ATLAS DDM (Distributed Data Management) for the Tiers of ATLAS (ToA).
The ToA describes all storages used for reading and writing ATLAS official data, their properties, transfer tools, local catalogues as well as the topology and associations between sites.
Data transfer and data access
To take profit of DDM
Procedure To finish the process:
Memorandum of Understanding (MoU)
To have the green light from Spanish Authorities
To inform PiC (Spanish Tier-1) evaluation and inclusion in the ‘Tiers of ATLAS list’
Requirements for ATLAS Computing : space tokens (MCDisk, DATAdisk)
See example of Valparaiso
To add the M-T3 to the ToA list

23. 5.- Conclusions and Perspectives From the Tier-2 Project point of view
This project falls entirely within the period of ATLAS as an running experiment
Changes to a more ‘transversal operative point of view’
The Transition from Operational mode with Simulated Data to the Real Data Operational mode has been completed . It works without major problems
Strong improvement of reliability/availability
Infrastructure: Strengthen monitoring, to optimize the access to LUSTRE and dCACHE
Computing shifts and Core Computing tasks are becoming a no-negligeble task (an activity task devoted to this activity)
User Support: more effort is needed to get a more efficient system
Distributed Analysis: the present status is not ‘the end of the story’, DA is evolving.
Interactive Analysis: to provide a stable PROOF facility
Perspectives
The follow-up expressed in the conclusions
Sustainability of the Infrastructure: Resource Renewal, personnel, …
WLCG interaction/framework in the NGI and EGI (?)

24. From the Rabat-Valencia Collaboration point of vieW:
CONCLUSIONS:
We are delayed wrt the previous plans in the ATLAS GRID collaboration management side;
Emphasis has been in HEP and Medical Physics interaction between our two groups : Very positive synergy!
HEP and Medical Physics have very good scientific outcomes
From the e-Science point of view a large scope has been obtained and it is OK!!
PERSPECTIVES:
… we need to speed up the process to include the Morocco’s T3 in the ToA list and this achievement will give us a better interplay between our institutions
Non-presential meetings (video or audioconference) will be needed to discuss the evolution of the T3-T2 issues -

25. Backup Slides