US ATLAS Tier 1 Facility Rich Baker Deputy Director US ATLAS Computing Facilities October 26, 2000

10/26/00US ATLAS Tier 1 Facility - Rich Baker Existing Facility

10/26/00US ATLAS Tier 1 Facility - Rich Baker

10/26/00US ATLAS Tier 1 Facility - Rich Baker Full Scale Facility (1) Based on NCB Review Numbers –Focus on Analysis (200k of 209k SI95) –Probably Insufficient for Simulation CPU: 209,000 SpecInt95 –Commodity Pentium/Linux –Estimated 640 Dual Processor Nodes Online Storage: 365 TB Disk –High Performance Storage Area Network –Baseline: Fibre Channel Raid Array

10/26/00US ATLAS Tier 1 Facility - Rich Baker Full Scale Facility (2) Tertiary Storage: 2 PB Tape Library –Baseline: HPSS, STK Media & Tape Drives –75% Event Summary Data –25% Simulation, Analysis Objects, Local Data –“Raw” I/O Rate: 400 MB/second, 12.5 PB/year –Exploit Use Patterns to Maximize Efficiency Random Access to AOD - Always on Disk Managed Access to ESD - Grid SW? Custom SW?

10/26/00US ATLAS Tier 1 Facility - Rich Baker Timeline Overview Prototype – FY ‘01 & FY ‘02 –Initial Development & Test, 1% to 2% scale –Establish Facility Independent from RCF –Lessons Learned from RCF Experience System Tests – FY ‘03 & FY ‘04 –Large Scale System Tests, 5% to 10% scale –Support Growing Tier 2 Network Operation – FY ‘05, FY ‘06 & beyond –Full Scale System Operation, 20% (‘05) to 100% (‘06)

10/26/00US ATLAS Tier 1 Facility - Rich Baker Tier 1 Facility Capacity

10/26/00US ATLAS Tier 1 Facility - Rich Baker

10/26/00US ATLAS Tier 1 Facility - Rich Baker Estimation Methods - Hardware (1) Use Recent RCF Purchases as Cost Baseline Moore’s Law Scaling for Commodity Components (CPU, Disk, Tape) STK Tape Drives: Constant Cost per Drive, Double I/O Capacity Every 2 Years Similar Constant Cost Projections for High Performance Data Mover Nodes –$40K per HPSS Mover Node –$30K per SAN Control Node

10/26/00US ATLAS Tier 1 Facility - Rich Baker Estimation Methods - Hardware (2) Local Area Network: 8% of Disk+CPU Cost plus $20K per HPSS Mover Firewall/WAN Hardware: 25% of LAN Cost Interactive Nodes –2 Linux Nodes Purchased per Year –Maintain One Sun/Solaris Node “General Purpose” Nodes –21 Currently for RCF - Estimate 25 for ATLAS

10/26/00US ATLAS Tier 1 Facility - Rich Baker Share Site License Costs with RCF –HPSS: 50% of $200K by 2005 –LSF: 50% of $65K Starting 2002 Veritas: $5K per SAN Control Node –Or Other SW Choice Most Other SW License Costs Can Only be Estimated - Total $97K in 2005 –Good Estimate Based on Actual RCF Costs to Support Operational Facility & Development Estimation Methods - Software

10/26/00US ATLAS Tier 1 Facility - Rich Baker Tier 1 Budget Numbers (k$) HPSS License Double Counted

10/26/00US ATLAS Tier 1 Facility - Rich Baker

10/26/00US ATLAS Tier 1 Facility - Rich Baker Tier 1 Material Numbers (k$) HPSS License Included in HPSS Column Volume Manager SW (Veritas) Included in Disk Column “Other” Includes Power, Videoconference, Supplies

10/26/00US ATLAS Tier 1 Facility - Rich Baker

10/26/00US ATLAS Tier 1 Facility - Rich Baker Tier 1 Facility Beyond 2006 Staffing: Constant at 25.5 FTE Major HW Components –Constant $ at 33% of 2006 Full Facility Cost –Allows for Continual Upgrade All Other Costs Level at 2005/2006 Levels

10/26/00US ATLAS Tier 1 Facility - Rich Baker Comments Scaleable Design - Recent 2.5X Expansion Very Late Bulk Procurement –Working System Earlier - Minimize Design Risk –Maximize Moore’s Law Advantage –Retain Flexibility as Long as Possible Leverage RCF Knowledge –Lessons Learned –Improved Estimation

10/26/00US ATLAS Tier 1 Facility - Rich Baker Summary Facility Already Running Near Term Prototype Planning in Progress Budget Exceeds Agency Guideline by 33% –Despite Recent 2.5X Scale Expansion! Estimates Are Realistic –Detailed Cost Basis From Recent Purchases –Moore’s Law Uncertainty Build to Cost Contingency Feasible –As Long as Tier 2 Facilities Are Funded