Data center services explained: colocation, retail, wholesale

A data center is, at heart, a building that solves three problems for your servers: power that never dies, cooling that keeps hardware alive, and physical security nobody has to think about. Everything else is packaging.

Colocation ('colo') is the core service: you own the servers, they provide the house. You rent space — a quarter rack, a full cabinet, or a locked cage — and plug into their power, cooling, and network access. Your team keeps the hardware; their team keeps the lights on and the doors locked.

Retail vs wholesale colo is about scale and lease structure. Retail colo is the small stuff — partial racks to a few cabinets, flexible terms, typical for a business with a handful of servers. Wholesale is private suites and large power commitments, priced per kilowatt or megawatt, for companies running hundreds of machines. If you're reading this, you're almost certainly a retail customer.

The pricing pieces that matter: the rack or cabinet itself, power (often the real cost — metered or allocated per circuit), cross-connects (physical cables to carriers or other tenants, billed monthly each), and remote hands (the on-site techs who reboot a box or swap a drive for you, billed per ticket or per hour). A cheap rack quote can double once power and cross-connects are added.

Connectivity is the underrated part. A good data center hosts many carriers, so you can buy internet or private circuits from whoever prices best — that competition alone can pay for the move. Ask how many carriers are in the building and what a cross-connect to each costs.

Contract traps to check: power overage rates (exceeding your allocated circuit gets expensive fast), minimum-term commitments with escalators in year two and three, and auto-renewal clauses that require months of notice to leave.

Why businesses still colocate instead of going all-cloud: predictable costs for steady workloads, hardware you control, compliance requirements, and keeping latency-sensitive systems close to your office or your carriers. It's not old-fashioned — for the right workload it's cheaper than cloud.

If you're weighing colo against cloud or outgrowing a server closet, a TSI advisor can compare facilities near you, decode the power and cross-connect pricing, and get competing quotes — free.