1. May 23, 2007ALICE DOE Review - Computing1 ALICE-USA Computing Overview of Hard and Soft Computing Resources Needed to Achieve Research Goals 1.Calibration 2.Transfer 3.Reconstruction 4.Storage 5.Analysis 6.Simulations ALICE Computing models and projections to be used where possible

2. May 23, 2007ALICE DOE Review - Computing2 EmCal Offline - Status and Plans Geometry –Structures implemented –Revisit following installation Data –Raw and Event Summary Data structures defined Alignment –Alignment tools implemented –Revisit after survey (installation) Calibration –Data structures defined –Procedures to be implemented Reconstruction –First interation clusterizer implemented –Optimization underway PID –Preliminary  /h discrimination and  0 ID implemented –electron id under study

3. May 23, 2007ALICE DOE Review - Computing3 Offline FTE Projections Totals represent only support for Physics Analysis –Current effort from LBNL, WS, Yale, UH Some positions filled outside DOE-NP –Current Offline Coordinators : Jennifer Klay (CalPoly-NSF), Gustavo Conesa Balbastre (Frascati) TaskFY08FY09FY10FY11FY12 Calibrations0.250.50 0.25 Trigger0.25 Reconstruction0.50 Simulation0.50 Analysis0.00 0.250.50 Offline Coordinator0.25 Total 1.75 2.25

4. May 23, 2007ALICE DOE Review - Computing4 Computing Hardware Requirements ALICE Computing Model submitted to WLCG 2007 Based on LHC data projections * reconstruction times ALICE-USA contribution ~ 8% (40/500 Ph.D. fraction) Distribute 8% across four U.S. computing facilities –4.0% NERSC direct DOE-NP investment –1.5% TLC through UH DOE-NP proposal –1.5% OSC through OSU NSF proposal –1.0% LC through LLNL internal resource Network needs are modest –total ESD data export rate is 120MB/s (4-month shutdown) –test data transfer in July for OSC, LC

5. May 23, 2007ALICE DOE Review - Computing5 NERSC Projections (Preliminary) P. Jacobs Storage provided by NERSC allocation 2.0 FTE support needed (RNC proposal process)

6. May 23, 2007ALICE DOE Review - Computing6 Texas Learning & Computation Center 150 nodes Itanium and 20 nodes Opteron HPSS, 24/7 support TLC highly regarded for past achievements AliEn installed and running in PDC07 Projected total computing to be provided in UH proposal - costs shown are for cpu only, disk match from TLC - 0.75 FTE match from TLC for system support - 1.0 FTE match from UH for software development

7. May 23, 2007ALICE DOE Review - Computing7 Livermore Computing (LLNL) Assume 15% sustained use of 640 cpu Opteron cluster (equals 1% of aggregate cpu) 24/7 support, HPSS 700 TB green data oasis outside firewall AliEn software install proceeding –requires LLNL account to submit jobs (AliEn compliant) –discussions underway between Jason Newby, Brian Carnes (allocations), and Jeff Long (data oasis)

8. May 23, 2007ALICE DOE Review - Computing8 Ohio Supercomputing Center (OSU) Supported by State of Ohio, Industrial Partners, DoD Current systems : 252 node Pentium, 260 node Itanium AliEn software running HPSS, 24/7 support, and funding for Bjorn Neilsen on offline New 4212 core Opteron system in 2008 Projections beyond 2008 in OSU NSF proposal –$100k/yr and 1:1 match, or –$50k/yr and 2:1:1 match via OHIO Technical Action Fund (TAF) Reasons to include OSU in Computing Plan –cpu/PhD ratio above ALICE-USA average –small scale DOE-NSF collaboration

9. May 23, 2007ALICE DOE Review - Computing9 Computer Hardware Summary Summed projections meet/exceed 8% contribution by 2010 8% Total

10. May 23, 2007ALICE DOE Review - Computing10 FTE Summary TaskFY08FY09FY10FY11FY12 Calibrations0.250.5 0.25 Trigger0.25 Reconstruction0.5 Simulation0.5 0.500.5 Analysis0.0 0.250.5 Comp. Coord.0.25 Offline Coord.0.25 Grid Coord.0.50.25 Site Coord. (4x)1.0 Total 3.5 3.75 Most is re-direction, some effort outside DOE-SC Grid Coord. responsible for OSG interface Additional NERSC 2.0 FTE to cover PDSF site coord.

11. May 23, 2007ALICE DOE Review - Computing11 Computing Organization Jason Newby

12. May 23, 2007ALICE DOE Review - Computing12 Risks & Mitigations One or more facilities fall below projections –recruit additional facility, i.e. ORNL –distribute load to remaining facilities –distribute load across grid (reason for OSG work) EmCal Offline milestones unmet (low) –redirect effort to offline Summary EmCal Offline in respectable shape at this time Hardware –PDSF investment plan underway –UH proposal to DOE –LC implementation making progress –OSC proposal to NSF