Datacenter tiering


Datacenter tiering

Tier 1:
– 99.671% uptime
– annual 28.8 hrs downtime
– full shutdown for preventive maintenance

Tier 2:
– 99.741% uptime
– annual downtime of 22 hrs
– some redundancy with single path for power, requiring shutdown for preventive maintenance

Tier 3:
– 99.982% uptime
– annual 1.6 hrs downtime
– sufficient redundancy to allow planned maintenance
– at least 13.2 KV power

Tier 4:
– 99.995% uptime
– annual downtime of 0.4 hrs
– multiple paths to power and AC and designed to handle worst case scenario with no critical impact
– at least 26.2 KV power

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