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20 Jun 2007

Tears in the data center

Have you heard people talking about "tier three data centers" etc. and wondered what planet they were from? Well The Uptime Institute has the answer - a short white paper explaining the characteristics of each of the four tiers, handily numbered I (basic) through IV (fault tolerant) for the Romans amongst us.

It's interesting that the top-of-the-range fault tolerant/highly resistant tier IV data center listed in one of the tables achieved 99.995% availability (down for just under half an hour per year!), still short of the "five nines" availability that people with very deep pockets sometimes insist they need.

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