Originally Posted by
RevMan2
Any decent data centre has an array of batteries that kick in as soon as one of the main power supplies( you'll normally have 3) fails and keep the machines running until the whacking great diesel generator (kept at operating temperature) takes over. It'll have fuel for the next 48 hours.
And you'll have your core systems mirrored.
This is industry standard.
Indeed. The previous company I worked for had linked, but fully redundant data centers in Europe, Asia and USA. Any 2 could fail and the third would run the companies business needs on a standby generator for 48 hours. The system was tested every 4 months, by taking one center fully off line and observing the others picking up the extra work.
IIRC they spend £350K on each system, which is quite reasonable for the levels of security provided. This was easily agreed by management, as it was less than 1 days loss of revenue if everything went TU.