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Migrating a Large Healthcare Network to Improve Performance and Availability

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george.james

Lessons learned from migrating a large scale healthcare application from Windows to Unix at Partners Healthcare in Boston MA.

Health & MedicineBusiness
1 of 25
[object Object],[object Object],[object Object]
In the next half hour… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Partners Healthcare System ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Anchor Hospitals & Airport BWH MGH Logan Airport 10 km 6 km
Acute Care Hospitals MGH BWH Newton- Wellesley Community Physician Practices
Partners Domain Devices Internet 12,000 Printers 32,000 Desktops Firewall ~30,000 other devices 1,450 Servers Closely Managed Assumed Managed
Windows Production Architecture 3.5 TB
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
Integration Components
Gigabytes in Use
Annual Database Growth Rate
Database Utilization Average Database References per day in Billions
The Need to Migrate - Availability Monthly Downtime Current State Business need
Additional Business Requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Caché Migration Decision Making Process ,[object Object],[object Object],[object Object],[object Object],[object Object]
Phased migration approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
UNIX Benchmark Environment
Database Benchmark Load Testing Results ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],0.66 0.15 0.32 LMR avg Caché app time (in sec.) 40,000 40,000 11,806 LMR transactions (5 min. period) 135,000 30,000 35,000 Database Global Refs / sec. Benchmark full script load Benchmark “paced” script load Production peak (8/21, 11:20 am) Metric
Design and Configuration Considerations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Benchmark Discoveries led to Production Improvements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
75% reduction in long running transaction
Phased Migration Approach
Monthly Average Caché Web Transaction Time
Application Models ,[object Object],Browser client Web server Cache Cache VB client .Net server Cache Cache .Net client Browser client Web server Cache Web Services Browser client .Net client Scalability/Connection pooling, robustness/error handling, Vism Managed Obj. Vism.ocx Managed Obj. Cache Web Services WebLink
The experiences of migrating a large scale, high performance healthcare network Larry Williams Corporate Manager, Partners HealthCare

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