Partners Healthcare migrated their large-scale Caché database from a mixed Windows and UNIX environment to a new highly available UNIX architecture using HP servers. They took a phased approach, first benchmarking performance on test systems, then migrating the database tier and finally the application tier. Benchmarking revealed optimizations that improved performance in production. The new environment provided improved availability, scalability and reduced maintenance needs to support continued rapid growth of the healthcare network.

4. Anchor Hospitals & Airport BWH MGH Logan Airport 10 km 6 km

5. Acute Care Hospitals MGH BWH Newton- Wellesley Community Physician Practices

6. Partners Domain Devices Internet 12,000 Printers 32,000 Desktops Firewall ~30,000 other devices 1,450 Servers Closely Managed Assumed Managed

7. Current Mixed-Mode Production Architecture

8. Enterprise Integration Over 30% are to and from Caché database Change from prior year Daily Average Est. Annual Transactions # of Interfaces 196 170 192 167 37% 4,659,035 1,330,962,017 2007 40% 3,399,211 1,240,712,044 2006 45% 2,431,917 887,649,802 2005 1,673,515 610,833,080 2004

9. Integration Components

10. Annual Database Growth Rate

11. Database Utilization Average Database References per day in Billions

12. The Need to Migrate - Availability Monthly Downtime Current State Business need

16. UNIX DataBase Tier Benchmark Environment

17. UNIX Application Tier Benchmark Environment

21. Post UNIX DB migration - 50% Reduction in Outlier Transaction

22. Monthly Average Caché Web Transaction Time

23. Unprecedented Growth - The LMR

24. Phased/Parallel Migration Approach

25. Parallel Migration Testing and Certification Effort DEV VC/m DEV QA PROD QA auto copy on promote promote check-out & check-in Developer test Analyst cert Production release promote auto copy on check-in Caché Environment 5.0 (WIN) 2008.1 (UNIX)

27. The experiences of migrating a large scale, high performance healthcare network Larry Williams Corporate Manager, Partners HealthCare