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Tier Certification agency
Tier Certification agency
Data center tier standards are a standardized methodology used to determine availability in a facility. The tiered system, developed by the Uptime Institute, offers companies a way to measure return on investment (ROI) and performance, thus enhancing availability and reliability of the data center facility as well as providing an optimum operational environment at minimal cost.
Tier certification is awarded by the Uptime Institute, an unbiased advisory organization focused on improving the performance, efficiency, and reliability of business-critical infrastructure,
Tier Level classification( 1 )
| Tier requirement | Tier-I | Tier-II | Tier-III | Tier-IV |
|---|---|---|---|---|
| Source | System | System | System | System + System |
| System component redundancy | N | N + 1 | N + 1 | Minimum N+1 |
| Distribution paths | 1 | 1 | 1 normal and 1 alternate | 2 Simultaneously active |
| Compartmentalization | N / A | N / A | N / A | Yes |
| Concurrently maintainable | No | No | Yes | Yes |
| Fault tolerance(Single event) | No | No | No | Yes |
Tier Level classification( 2 )
Tier-l, Basic
- Non-redundant capacity components
- Single non-redundant distribution path
- Twelve hours of on-site fuel storage for generator(s)
- Planned work will require of the infrastructures
- An unplanned outage or failure will impact the critical environment
Tier-II, Redundant
- Include Tier-l condition
- Redundant capacity components(N+1)
- Single non-redundant distribution path
- Redundant components can be removed from service on a planned basis
- An unplanned outage or failure will impact the critical environment
Tier-III, Concurrently maintainable
- Include Tier-l , II condition
- Multiple independent distribution paths
- Twelve hours of on-site fuel storage for “N” capacity
- All IT equipment is dual powered
- Generators shall not have a limitation on consecutive hours of operation (Tier III&IV)
- Be susceptible to disruption from unplanned activities
Tier-IV, Fault Tolerant
- Include Tier-l , II and III condition
- Redundant capacity components(2N)
- Distribution paths must be physically isolated
- Continuous cooling is required
- Generators shall not have a limitation on consecutive hours of operation (Tier III&IV)
- A single failure will not impact the critical environment
