The Move Where Nothing Must Break
A cloud migration is like relocating a company—except you have to keep working during the move, nothing can get lost, and the new building is still being constructed at the same time. Sounds stressful? It can be. But it doesn't have to be, if you prepare.
What used to be a mammoth two-year project can now be accomplished in a few weeks to months, thanks to modern tools and proven methodologies. At the same time, the requirements have grown: NIS2 compliance, data sovereignty, AI integration. Planning matters more than ever.
Before You Migrate Anything: Understand What You Have
The most common mistake in cloud migrations is just diving in. Pushing servers into the cloud one by one and hoping it works. That's called "lift and shift," and it's roughly as smart as packing your entire cellar for a house move—including things nobody's touched in ten years.
Start with an inventory. What servers do you have? What applications run on them? What dependencies exist? What does current operations cost? And perhaps the most important question: what do you actually still need?
In almost every company, there are systems nobody uses anymore but that keep running because no one dared to switch them off. The 6R model helps with classification: Rehost (move 1:1 to cloud), Replatform (minor adjustments), Refactor (fundamentally rebuild), Repurchase (replace with SaaS), Retain (leave for now), and Retire (shut down). Typically, 10-20% of all systems fall into the last category. That saves not just migration effort but ongoing costs too.
The Five Phases—Without PowerPoint Waffle
Phase 1: Assessment. Two to four weeks. Take inventory, classify applications, build the business case. At the end, you know what's being migrated, how it's being migrated, and what it will cost.
Phase 2: Planning. Two to four weeks. Make architecture decisions (network, identity, security), define migration waves, create a realistic timeline. Realistic meaning: not what the board wants to hear, but what's actually achievable.
Phase 3: Preparation. Two to six weeks. Set up the cloud environment (landing zone), establish network connectivity, train the team. This step is consistently underestimated. A poorly prepared environment will come back to haunt you in every subsequent phase.
Phase 4: Migration. Four to sixteen weeks, depending on scope. Migrate in waves, not all at once. First wave: non-critical systems and test environments (learning experience). Second wave: standard workloads like email and file servers. Third wave: databases. Fourth wave: business-critical systems. After each wave: test, test, test.
Phase 5: Optimisation. Permanent. Monitor costs, right-size resources, shut down unused services, leverage cloud-native features. The real benefits of cloud—agility, innovation, cost efficiency—only emerge after the migration, not during it.
The Weekend When It Gets Serious
The cutover—the moment systems switch from old to new—is the most critical part. For most SMEs, a weekend cutover works best.
Friday 6 PM: freeze. No more changes. Friday 8 PM: start final data sync. Saturday morning: validation, network cutover, DNS switchover. Saturday afternoon: go/no-go decision. Sunday: extended testing. Monday morning: hypercare support—the whole IT team stands ready in case something doesn't work.
The most important thing: have a rollback plan. If something fundamentally goes wrong during cutover, you need to get back to the old systems within hours. Without a Plan B, Plan A is negligent.
The Costs—and When the Investment Pays Off
Migration costs money. There are one-off project costs for tools, consultants, and internal resources, plus the ongoing cloud costs that replace your previous on-premises expenses.
The typical break-even point is 18-24 months. In the first year, total costs are often higher than before, because migration costs and parallel operations add up. From year two, costs drop as hardware maintenance, electricity, cooling fall away and resources can be scaled flexibly.
But cloud isn't automatically cheaper. Without active cost management, the monthly cloud bill can quickly spiral. Forgotten test VMs running for months. Oversized instances that are never fully utilised. Auto-scaling that scales in the wrong direction. FinOps—the discipline of cloud cost management—belongs on the agenda from day one.
Migration Is a Project. Cloud Is a Journey.
The move isn't the end—it's the beginning. The really exciting things happen afterwards: leveraging cloud-native services, building automation, integrating AI capabilities, enabling new business models. All of this becomes possible because you're no longer busy keeping old hardware alive.
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