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Data center Tiers (I-IV) Explained

Tier classifications in a data center signify a standardized methodology used to describe site level infrastructure required to sustain data center infrastructure analyzing its expected availability (performance), functionality and capacity.

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Data center Tiers (I-IV) Explained

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  1. Data center Tiers (I-IV) Explained Data Center Tiers (I-IV) Classification as per Uptime Institute

  2. What do Data center Tiers signify? • Tier classifications in a data center signify a standardized methodology used to describe site level infrastructure required to sustain data center infrastructure analyzing its expected availability (performance), functionality and capacity.

  3. The 4 Data Center Tiers • Tier 1- Basic Data center Site Infrastructure • Tier 2 - Redundant Site Infrastructure Capacity Components • Tier 3- Concurrently Maintainable Site Infrastructure • Tier 4- Fault Tolerant Site Infrastructure

  4. Evaluation Parameters of Data Center Tiers • The Tier number designation to any data center is based on the evaluation of following parameters • Investment • ROI (return on investment) • Infrastructure

  5. Tier 1- Data center Site Basic Infrastructure • Expected Availability- 99.671% Uptime/year • No redundancy • 28.8 hrs of downtime/year • Susceptible to operational & human errors • Demands annual maintenance requiring site-wide shutdown

  6. Tier 2 - Redundant Site Infrastructure Capacity Components • Expected Uptime- 99.749% Uptime/year • Partial redundancy in power and cooling • Experiences 22 hours of downtime/year • Susceptible to operational & human errors • Demands annual maintenance requiring site-wide shutdown • Component removal doesn’t impacts computer equipment

  7. Tier 3- Concurrently Maintainable Site Infrastructure • Expected availability- 99.982% Uptime/year • Max 1.6 hrs of downtime/year • N+1 fault tolerant providing at least 72 hours power outage protection • Facility to manage maintenance periods without affecting the continuity of service on the servers • Less susceptible to operational & human errors • Annual maintenance without operational shutdowns

  8. Tier 4- Fault Tolerant Site Infrastructure • Expected availability- 99.995% Uptime/year • 2N+1 fully redundant & fault tolerant infrastructure • 26.3 minutes downtime/year • Not susceptible to operational & human errors • Annual maintenance without operational shutdowns

  9. Data Center Tiers Summed Up • 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.

  10. Thank You Want further insights related to data center? Just visit our official blog here- www.rackbank.com/blog Website: www.rackbank.com

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