About Data Centre Tiers
Every hosting provider will advertise their state-of-the-art data centre, but how can you really tell what features are being offered?
To help shed some light on this, a four tier system was pioneered by The Uptime Institute to grade data centre infrastructure design and availability, this system serves as the industry standard today. The four tiers, as classified by The Uptime Institute are as follows:
- Tier 1: composed of a single path for power and cooling distribution, without redundant components, providing 99.671% availability.
- Tier II: composed of a single path for power and cooling distribution, with redundant components, providing 99.741% availability
- Tier III: composed of multiple active power and cooling distribution paths, but only one path active, has redundant components, and is concurrently maintainable, providing 99.982% availability
- Tier IV: composed of multiple active power and cooling distribution paths, has redundant components, and is fault tolerant, providing 99.995% availability.
Hyve operates Tier III data centres
Tier I sites will have computer power distribution and cooling but may not have raised floors, UPS’s, or engine generators. The critical load on these systems is up to 100 percent of N. Even with a UPS or generator, they likely are single-module systems and have many single points of failure. The infrastructure should be completely shut down on an annual basis to perform preventive maintenance and repair work. Urgent situations may require more frequent shutdowns.
Tier IV data centres have all the bells and whistles; everything needed to keep them running without ever shutting down for maintenance, no matter what happens.
|Features||Tier I||Tier II||Tier III||Tier IV|
|Number of delivery paths||Only 1||Only 1||1 Active, 1 Passive||2 Active|
|Redundant components||N||N+1||N+1||2(N+1) or S+S|
|Support space to raised floor ratio||20%||30%||80-90%||100%|
|Raised floor height||12″||18″||30-36″||30-36″|
|Floor loading pounds/ft2||85||100||150||150+|
|Utility voltage||208, 480||208, 480||12-15kV||12-15kV|
|Months to implement||3||3 to 6||15 to 20||15 to 20|
|Year first deployed||1965||1970||1985||1995|
|Construction $/ft2 raised floor||$450||$600||$900||$1,100+|
|Annual IT downtime due to site||28.8 hrs||22 hrs||1.6 hrs||0.4 hrs|
*Excludes land and abnormal civil costs. Assumes minimum of 15,000ft2 of raised floor, architecturally plain one storey building fitted out for the intitial capacity, but with the backbone designed to reach the ultimate capacity with the installation of additional components.
If you would like more information regarding our enterprise cloud hosting solutions, please complete our contact form or call us directly on 0800 612 2524.
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