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What is a Tier 3 data center according to the Uptime Institute?
Basic site infrastructure with expected availability of 99.671
Concurrently maintainable site infrastructure with expected availability of 99.982
Fault-tolerant site infrastructure with electrical power storage and distribution facilities with expected availability of 99.995
Hot-site enabled facility with electrical power storage and distribution facilities with expected availability of 99.998
Tier Level Requirements
1 Single non-redundant distribution path serving the IT equipment Non-redundant capacity components Basic site infrastructure with expected availability of 99.671%
2 Meets or exceeds all Tier 1 requirements Redundant site infrastructure capacity components with expected availability of 99.741%
3 Meets or exceeds all Tier 2 requirements Multiple independent distribution paths serving the IT equipment All IT equipment must be dual-powered and fully compatible with the topology of a site's architecture Concurrently maintainable site infrastructure with expected availability of 99.982%
4 Meets or exceeds all Tier 3 requirements All cooling equipment is independently dual-powered, including chillers and heating, ventilating and air-conditioning (HVAC) systems Fault-tolerant site infrastructure with electrical power storage and distribution facilities with expected availability of 99.995%
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