Availability Requirements

All production instances of the internal portal worldwide must be available 24x7x 365 with 98% uptime. To meet this requirement, the SunWeb 4.0 architecture defines multiple redundant portal servers and gateways. Operationally, each server is online and load balanced. If one server fails, all requests are redirected to the remaining servers.

The long-term goal is 99.99% uptime worldwide, as SunWeb and SRA are an integral part of Sun's business continuity and disaster-recovery strategy. One way to meet this goal is to have three global instances, each at 99.9% availability.