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Tier 3 Data Center

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

A Tier 3 data center is the second-highest certification in the Uptime Institute’s system of classifying data center performance into four tiers.

In addition to meeting the requirements of Tier 1 and Tier 2 data centers, Tier 3 data centers must achieve the following:

  • N+1 redundancy. Tier 3 data centers provide N+1 redundant power and cooling distribution paths to allow for routine maintenance without downtime.
  • 72-hour outage protection. Three days of independent power that is not connected to any outside source is required.
  • No more than 1.6 hours of downtime per year. This is the maximum amount of downtime allowed in a year for maintenance and emergencies.
  • 99.982% uptime. Some downtime may occur for unplanned maintenance and emergencies. Customer-facing services may be impacted.

Tier 3 data centers are the most common certification by the Uptime Institute and are often utilized by organizations larger than a typical small- to medium-sized business. Tier 3 providers feature many of the offerings of Tier 4 providers but guarantee slightly less uptime and are not completely fault-tolerant.

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Software-Defined Data Center (SDDC)
A software-defined data center (SDDC) is a facility in which all the infrastructure, such as networking, storage, and compute, is virtualized and delivered as a service.
Learn even more about this term