# Presentation: 295483

## U.S. ATLAS Overview

- Project Management			J. Huth
- Software					T.Wenaus
- Architecture				D. Quarrie
- Physics					I. Hinchliffe
- Data Management			D. Malon
- Facilities Overview			B.Gibbard/R. Baker
- Grid Computing, ATLAS Testbed	R. Gardner/K. De
- Project Management Perspective	H. Gordon

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## U.S. ATLAS Project Overview

**John Huth**
**Harvard University**
- LHC Computing mid-term Review
- NSF Headquarters
- June 2002

## Major Changes Since Nov. Review

- Research Program Launched – M+O and Computing considered as one “program”
- Funding shortfall relative to guidance
- Extreme tension on the M+O and Computing split
- LCG Project Launched
- Major US ATLAS participation
- LHC turn-on 2007
- Data Challenge Delays
- Hybrid Root/RDB solution adopted
- Supercomputing demonstrations  (iVDGL/GriPhyN/PPDG)
- Work toward University based ITR proposal

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## International ATLAS

- Issue of competing frameworks has been settled
- New simulation coordinator: Andrea Dell’Aqua
- Major new releases of Athena (control/framework)
- Lack of infrastructure remains a problem
- Intl. ATLAS management is determined to solve it!
- Ramp up of grid activities, in context of Data challenges
- P. Nevski (BNL) in support role
- Delay of data challenge 1, phase 2 by approx. 6 months
- J. Shank named muon software coordinator
- Geometry model of CDF leading candidate (J. Boudreau)
- Hybrid database decision (LCG RTAG – see talks)

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## FTE Fraction of Core SW

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## Project Core SW FTE

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## ATLAS Detector/Task matrix

|  | Offline Coordinator | Reconstruction | Simulation | Database |
| --- | --- | --- | --- | --- |
| Chair | N. McCubbin | D. Rousseau | A. dell’Aqua | D. Malon |
| Inner Detector | D. Barberis | D. Rousseau | F. Luehring | S. Bentvelsen |
| Liquid Argon | J. Collot | S. Rajagopalan | M. Leltchouk |  H. Ma |
| Tile Calorimeter | A. Solodkov | F. Merritt | A. Solodkov | T. LeCompte |
| Muon | J. Shank | J.F. Laporte | A. Rimoldi | S. Goldfarb |
| LVL 2 Trigger/ Trigger DAQ | S. George | S. Tapprogge | M. Weilers | A. Amorim |
| Event Filter | F. Touchard | M. Bosman |  |  |

**Physics Coordinator: F.Gianotti      Chief Architect: ****D.Quarrie**

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## LCG Project Structure

**Other**
**Labs**

**The LHC Computing Grid Project**

**LHCC**

**Project Overview Board**

**Reports**

**Reviews**

**Resources**
**Board**

**Resource Issues**

**Computing****Grid****Projects**

**Project execution teams**

**HEP****Grid****Projects**

**Project Manager**
**Project****Execution****Board**

**Requirements,**
**Monitoring**

**Software and****Computing****Committee**

**LCG Project Structure**

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## LHC Comp. Grid Project

- 3 Main bodies
- Proj. Oversight Board – yet to meet (J.Huth, US rep.)
- SC2 (Gives requirements, L. Bauerdick US rep.)
- Proj. Execution Board – T. Wenaus Applications leader
- D.B. RTAG gives recommendation (see talks)
- US ATLAS contributing (consonant with ATLAS goals)
- Phase I until 2004 (R+D), Phase II afterward
- 20% data challenge milestone in Dec. 2004 for Tier 0,1,2,3
- Drives Tier 1, 2 funding

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## Software

- Further consolidation
- Hybrid event store (ROOT + relational DB)
- Second framework effectively dead
- Athena developments
- Architecture model including triggers
- Infrastructure at intl ATLAS remains a problem
- One solution is “tithing” countries
- Tara Shears – web documentation, CVS support
- Steve O’Neal - librarian
- Data challenges and incorporation of OO reconstruction

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## Physics, Facilities

- New hire at LBNL for physics support
- Tier 1 ramp slowed by funding profile
- At a smaller level for participation in data challenges (barely making cut), participation smaller than % of authors
- 2004 milestone for LCG
- Continuing to explore all-disk solution
- Tier 2’s – US ATLAS testbed plans for SC2002 demo’s
- Grid enabled production
- Monitoring, virtual data, interoperability with CMS, replica and meta-data catalogs (GriPhyN, iVDGL, PPDG)

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## US ATLAS Persistent Grid Testbed

**UC Berkeley**
**LBNL-NERSC**

**Brookhaven**
**National**
**Laboratory**

**Indiana **
**University**

**Boston **
**University**

**Argonne**
**National**
**Laboratory**

**U Michigan**

**Oklahoma**
**University**

***Prototype Tier 2s***

- HPSS sites

**University of Texas**
**At Arlington**

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## Funding Issues

- Changing budget numbers, uncertainties very difficult to live with....
- For FY 02, living on goodwill, counting on $520k from NSF to prevent* further* reductions in force
- ANL, BNL, LBNL base programs are severely squeezed, additional burden on project costs
- Attempting to put together a large ITR using US ATLAS universities
- Monitoring, quality of service, networking

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## Positive News on Funding

- UT Arlington – MRI for D0 (ATLAS) K. De
- High Energy Physics Analysis Center
- J. Huth/J. Schopf (ANL/NW/Harvard) ITR Grant
- Resource Estimation for High Energy Physics
- Large ITR
- Resource Estimation (continuation of above)
- Networking
- Quality of Service
- Grid Monitoring
- Security
- Integration of all above into the ATLAS fabric

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## Budgeting

- Attempt to meet obligations for software and facilities
- Make “bare bones” assumptions – stretch out of LHC
- A big unknown is the result of the split between M+O and computing funds
- Have to guess at profiles for the time being

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## Assumed Budget Profile (AY$)

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## Bare Bones Budget

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## Responses to Recommendation from Nov.

- Received this last week
- Chief architect should have resources/authority
- Infrastructure remains an issue, Torsten Akesson is trying to solve this via the NCB – it has been recognized as the major issue in intl. ATLAS.  Software infrastructure team is being identified.
- Software decisions
- Resolution of second framework, some improvements overall, far from perfect
- Be less willing to take on additional workloads
- Trying, but infrastructure support is a major issue – in process of resolution.
- Staffing for DC 1 – progress, funding issues

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001

## Summary

- We are making progress on many fronts, despite funding uncertainties
- US ATLAS testbed, control/framework, data management, incorporation of grid tools.
- Tier 1 the most severely impacted by funding uncertainties
- Intl. ATLAS situation improving, but still has some distance to go
- We are barely rolling on the present budget
- Severe impact of base program cuts in US ATLAS institutions

- David R. Quarrie, LBNL               PCAP Review

- October 31, 2001