|Chief information security officers as compared to chief security officers are seeing more complex threats and solutions relative to data center and network operations.|
Information technology rates data centers by tiers. Tier 1 to 4 is a standardized methodology used to define uptime of a data center. This is useful for measuring:
- Data center performance
- ROI (return on investment)
Tier 4 data centers are considered the most robust and least prone to failures. Tier 4 is designed to host mission-critical servers and computer systems, with fully redundant subsystems (cooling, power, network links, storage) and compartmentalized security zones controlled by biometric access control methods. Naturally, the simplest is a Tier 1 data center used by small businesses or shops.
- Tier 1 = Non-redundant capacity components (single uplink and servers).
- Tier 2 = Tier 1 + Redundant capacity components.
- Tier 3 = Tier 1 + Tier 2 + Dual-powered equipment and multiple uplinks.
- Tier 4 = Tier 1 + Tier 2 + Tier 3 + All components are fully fault-tolerant including uplinks, storage, chillers, HVAC systems, servers, etc. Everything is dual-powered.