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Tier 2 Data Center

Noun
|
Sounds like: "tier two da-ta cen-ter"

A Tier 2 data center is the second-lowest certification in the Uptime Institute’s system of classifying data center performance into four tiers.

In addition to meeting the requirements of Tier 1 data centers, Tier 2 data centers must achieve the following:

  • Partial power and cooling redundancy. While there is not the N+1 or 2N+1 redundancy that Tier 3 and Tier 4 providers guarantee, there are some redundant components in place to help prevent downtime.
  • No more than 22 hours of downtime per year. This is the maximum amount of downtime allowed in a year for maintenance and emergencies.
  • 99.741% uptime. Since no part of the system is fault-tolerant, downtime will occur in the event of an unexpected outage.

Small- and medium-sized businesses often use this level as there are more guarantees of efficiency and redundancy than Tier 1, but significantly lower costs than higher tiers due to offering less redundancy and no protection from outages.

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Uninterruptible Power Supply (UPS)
An uninterruptible power supply (UPS) provides power to a data center in the event of a power failure.
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