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25 February,2011 by Jack Vamvas
There are considerable design considerations for designing redundancy into a SQL Server database system for high availability(HA).
The extent to which redundancy is built into a system will depend on : expertise, cost,resources, service level agreements (SLA)
General areas in considering the HA stack.Consider all these categories - ensuring every element is documented . One of the most resource intensive aspects of maintaining a high availability environment is the managing and monitoring of the system once it's designed and deployed
Physical locations (buildings,geography,server rooms zones)
Electricity
Network
Storage
Load Balancers
Servers
Web Layer
Middleware
Database Layer
Management\Monitoring
Author: Jack Vamvas (http://www.sqlserver-dba.com)
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