Question 1

What's the difference between OpEx and CapEx?

Accepted Answer

CapEx (Capital Expenditure) is money spent upfront to buy long-term assets like servers, storage arrays, and data center equipment. OpEx (Operational Expenditure) is ongoing spending to run the business, like monthly cloud bills, support contracts, and software subscriptions. Cloud often shifts costs from CapEx (buying hardware) to OpEx (paying for what you use).

Question 2

When should I choose an OpEx (pay-as-you-go) model in cloud computing?

Accepted Answer

OpEx is often a good fit when demand is variable, you want to avoid large upfront purchases, you need to move fast, or you prefer costs that scale with usage (for example, dev/test environments, seasonal workloads, new products, or rapid growth). It can also help when you want shorter procurement cycles and easier capacity changes.

Question 3

How much does OpEx cost in the cloud?

Accepted Answer

OpEx cost depends on what you consume and how efficiently you run it. Key factors include compute hours (instance type/size and runtime), storage capacity and access patterns, data transfer/egress, managed service usage (databases, analytics, messaging), licensing, support plans, and environment sprawl (unused resources). Costs can be reduced with right-sizing, autoscaling, turning off non-production resources, and commitment/discount programs (like reserved capacity or savings plans) when usage is predictable.

OpEx

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