A data center is a physical facility that houses computing, storage and networking equipment along with the power, cooling, fire protection and physical security needed to keep it running.
Why it matters
Almost everything online ultimately runs in a data center. Their design determines reliability: redundant power feeds, backup generators, multiple network carriers and cooling all reduce the risk of outages.
Providers often describe reliability using tiers or certifications, and cloud regions are made up of one or more data centers. Where a data center is also affects latency and data-protection law.
Example
A hosting company runs a facility with two independent power feeds, battery backup and diesel generators. Each server rack connects to two network switches, so a failed switch or feed does not stop service.
Common mistakes
- Assuming a single data center is enough for a business-critical service.
- Ignoring location when data must stay within a certain country.
- Confusing the data center with the company; a provider can operate many.
Related
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This page is general information written by our editorial team and updated when documentation changes. Servers and providers differ, so test changes safely first. See our editorial policy and disclaimer.