How Many Classes are There for Data Centers?

Data center facilities have turned into the first main concern for internet firms. Everything that is accessible on the web or internet is directly or implicitly interconnected to the data center facilities. People are becoming more alert about the data center and its facilities. Every data center doesn't have equal resources, tools, technologies, infrastructure, etc. Hence, every data center has its own Functionality of hosting servers and providing with facilities and services.

On behalf of a number of factors data centers have been classified into numerous Classes. These Classes classify their capacity, execution and up-time.:

Four Classes of data centers:

First:Tier1 data center is the most essential types of data centers. It is at the end of this ranking mathod.
It involves the following elements:
- Solo way for power allotment.
- Solo way for cooling allotment.
- Solo way for non-redundant IT tools and other components distribution.
- Promises to provide 99.671% running of the server.
- It can endure up to 28.8 hours of down-time per year.

Second: Tier2 data center is the next class and it involves the following elements:
-Solo way for power allotment.
- Solo way for cooling allotment.
- Superfluous IT tools and other components.
- Promises 99.741% running of the server.

Tier3: Tier3 data center realizes all Tier 1 and Tier 2 requirements.
It involves the following elements:
- Multiple independent active power allotment way.
- Multiple independent  active cooling allotment way.
- Superfluous IT tools and other components that are parallel maintainable and dual-powered.
- Promises 99.982% running of the servers.

Tier4: Tier4 data center is at the peak level and believed immune to planned and unplanned downtime.
It realizes all the Tier 1, Tier 2 and Tier 3 requirements  and involves the following elements:
- Multiple independent  active power allotment way.
- Multiple independent  active cooling allotment way.
- All cooling tools like; chillers, ventilating and air-conditioning systems that are separately dual-powered and fault tolerant.
- Cabling infrastructure has a Superfluous backbone.
- Superfluous IT tools and other components that are parallel maintainable and dual-powered and fault tolerant.
- Promises 99.995% running of the servers.
- It is believed the most robust and less prone to failures.

Now it is likely that Tier1 data center is used by small organizations or shops and Tier4 is made for mission-critical servers and big size organizations.