Understanding 6-sigma
Monday, March 15, 2010
10:02 AM
Understanding 6-sigma
To get 99.9999% availability, you need: 
At least one duplicate of your whole infrastructure, ideally geographically distributed. 
Ability to instantaneously switch between using copies of the infrastructure. 
Hot-swappable hardware in case of failures. 
Online backup. 
Redundant staff able to step in instantly: 2x to 3x the number of people you need to run the service. 
"Doing it yourself costs a lot!"