Explain like I'm five · Cloud

What is Multi-Cloud?

Multi-cloud, told as a strategy of moving into several buildings at once instead of depending on just one.

putting everything in just one building feels risky...relying on just one building for everything feels risky

Relying on just one building for everything feels risky.Using just one building means betting everything on it.

one building goes down, and my whole company goes down with itif you're in only one building, its trouble stops all your company's services

If you're in only one building, its trouble stops all your company's services.Because the company depended on only that one building.

Building ABuilding BBuilding Cmulti-cloud = one company moves into several buildings at oncea strategy to avoid depending on any one building

Multi-cloud = one company moves into several buildings at once.A strategy to avoid depending on any one building.

Prepares for disasterif one goes down, another covers
Compares the rentprice differs building to building
Meets local rulessome data must stay in a specific region
But there are more rules to learn and followbecause every building's rules differ
why split across several buildingsdisaster readiness: if one building goes down, another coversprice comparison: rent differs building to buildinglocal rules: some data must stay in a building in a specific regionbest-of-breed: each building is strong at different gear (services)

Here are four common reasons to split across buildings.Which reason matters most differs company to company.

different rules and terms per building — hard to learn them allstaff and cost grow with every extra building

Each building has its own rules and terms, so the company must learn and follow each set.Staff and cost grow with every extra building.

In one breath

Multi-cloud is a strategy where one company moves into several cloud "buildings" at once, to reduce the risk of depending on just one.

A strategy of using multiple cloud providers (two or more CSPs) at the same time. The goals are spreading risk against one vendor's outage or price hikes, using each provider's particular strengths, and meeting regional or regulatory requirements. The trade-off is that different providers have different APIs and operational models, so management complexity and cost rise together.

When grown-ups say it

Multi-cloud
The strategy of moving into several buildings at once. Reduces the risk of depending on just one.
Vendor lock-in
Being fit so tightly to one building's way that you can't move. Exactly the risk multi-cloud tries to reduce.
Disaster recovery
Another building covering when one goes down. The other building can only cover if data is copied there in advance; this is one reason to split across buildings.
Data sovereignty / regional rules
The rule that some data must stay in a building in a specific region. Especially important in the public sector.
Hybrid cloud
Using your own building together with a shared one. Often confused with multi-cloud, but the test differs — hybrid includes your own building.
Public-sector cloud adoption
The rule: move into a security-checked building, at the right grade. Public agencies sometimes use multi-cloud too, for reasons like saving cost or preparing for disaster. → into a security-checked building
Cloud service model
Bare shell / interior done / move-in ready. Any building is rented as one of these three models. → pick one to rent
API
Each building's own "how to apply for a lease" process. How programs give a building instructions — it differs by building, so each must be learned separately.
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