The data center consolidation and construction boom of the 21st century is well underway. As we work with Clients, helping with planning, advice, and project management of these changes foundational to the future performance of their enterprise, we always encounter the discussion of facility Tier Level rating.
The Tier Level rating refers to an industry standard way of describing the degree to which the facility can support constant uninterrupted operation of the data processing systems. We know that the systems themselves can be architected with high-availability configurations. Tier Levels though, refer to the capability of the facility itself to support the systems it contains. Utility power, temperature increases and so on are facilities issues, and are the foundation upon which any amount of data processing fault-tolerance stands.