Moving to the cloud: what changes and what does not

What the cloud actually changes

• You rent computing instead of buying and housing it.
• Capacity can go up and down with demand.
• Databases, backups and security updates can be handled as managed services.
• New environments take minutes to create, not weeks.

For a growing business this removes a whole category of work and delay.

What it does not change

A slow application is still slow on someone else's servers. Inaccurate data is still inaccurate. A process that needs three people to re-enter the same information still does.

If the real problem is the software or the process, a migration will cost money and leave the problem in place.

Three ways to move

• Move it as it is. The quickest route, with the least benefit: you have changed where it runs and little else.
• Adapt it. Keep the system but switch parts of it to managed services, such as the database.
• Rebuild it for the cloud. The most benefit, the most cost, and worth it only for systems that matter most.

Most organisations use all three, choosing per system. Not everything deserves a rebuild, and not everything needs to move.

Watching the cost

Paying only for what you use is an advantage when someone is watching what you use. Without that, test environments are left running, storage accumulates, and the bill grows month by month.

Set budgets and alerts from the first day, label resources by project, and review the bill regularly. Cost control in the cloud is a habit, not a setting.

Security is shared

The provider secures the buildings, the hardware and the platform. You remain responsible for how your systems are configured, who has access, and what happens to your data.

Many cloud security incidents come from configuration mistakes on the customer's side: storage left open, access granted too widely. The move makes good security easier to achieve, and no less necessary.

Where to start

• List your systems, what each depends on, and what it costs to run today.
• Choose a low-risk system to move first, and learn from it.
• Plan how you would move back if something goes wrong.
• Decide who owns cost and security before the first workload moves.

A first migration that goes well teaches the team more than any amount of planning, and it sets the pattern for the rest.