Cloud migration: a guide for companies

More and more companies are stopping buying their own servers and moving to the cloud. And most do it for the same reasons: pay only for what they use, don't depend on a machine in a basement room and be able to scale when the business grows. But the cloud isn't a switch you turn on: badly planned, a migration can cost more than the server you wanted to escape.

In this article I give you the practical guide we'd like every client to read before starting: when migrating pays off, what models exist, how to plan it in phases and what costs and risks the clouds hide. With this foundation you'll be able to make the decision with judgment and, if you need it, hire help knowing exactly what to ask for.

Should your company migrate to the cloud?

When it does pay off

The cloud shines in three concrete scenarios. The first is scalability: if your company grows by seasons or by projects, being able to add capacity in minutes (and remove it when it's no longer needed) is an advantage no physical server matches. The second is availability: the big providers offer redundancy that a single server can't replicate, with uptime above 99.9%.

The third is maintenance: you get rid of obsolete hardware, support contracts and the technician who every so often has to go to the server room. The cloud turns infrastructure into a managed service: you take care of your business and the provider makes sure everything keeps working.

When it's better to wait

Not everything is advantages. If your company has a very old and critical system that nobody knows how it works ("it works and better not touch it"), migrating it can be extremely expensive and risky. It's also worth thinking twice if you have very strict regulatory requirements about where data is stored, or if your budget is so small that the cloud's recurring monthly expense bothers you.

The key is not to decide by fashion: the cloud is one more tool, not a mandatory destination. Analyze what applications you have, how critical they are and what each model saves you before moving anything.

Cloud models and providers

IaaS, PaaS and SaaS explained clearly

The three models differ in how much you manage and how much the provider manages. In IaaS (infrastructure as a service) you rent machines, network and storage: you install and maintain the software. In PaaS (platform as a service) the provider gives you the environment ready to deploy your application and you only take care of the code. In SaaS (software as a service) you use the program directly over the internet, like corporate email or a CRM: you don't install or update anything.

The practical rule is simple: the less IT time and staff you have, the more it suits you to move up a level. A small business solved the problem with a SaaS; a company with very specific needs will end up in IaaS or PaaS.

How to compare providers

There are more options than it seems. The giants (Amazon, Microsoft, Google) offer the most complete catalog and the best availability guarantees, and European and local providers gain ground in data sovereignty and prices for the Spanish-speaking market. When comparing, look at four things: real price according to your use, ease of migrating your software, where the data is hosted and how you leave the provider if someday you want to go.

At TakeYourDesign we work with the main providers and help you choose with criteria that isn't the sales brochure's: the one that fits your current infrastructure and your budget. If you want guidance, our cloud services includes exactly that prior assessment.

The step-by-step migration plan

Inventory of applications and data

Before moving anything, you need to know what's there: what applications you have, what data each one stores, how much they weigh, who uses them and what dependencies they have with each other. Most migrations that get stuck do so here, in the surprise of discovering a "forgotten" application that supports a critical process. An honest inventory is the treasure map of every migration.

Choosing the model and provider

With the inventory in hand, you decide what goes to IaaS, what to PaaS and what stays where it is. Not all applications deserve to migrate at the same time or to the same place: the critical and stable ones go first, the experimental or half-abandoned ones can wait. This decision is made per application, not "in bulk".

Phased migration

Migrating everything at once is the recipe for disaster. The right thing is to do it in phases: start with a non-critical application, validate the result, adjust the process and continue. Each phase concludes with a review and the conscious decision to continue. That way, if something fails, the impact stays contained in one module and not across the whole company.

Testing environment

Before the final cutover, replicate the environment in the cloud and test under conditions as close to production as possible: real data, real users, real loads. It's the same principle we apply when we migrate websites: the change itself is easy; the hard part is that nothing breaks along the way. Testing first is what turns a migration into a routine operation.

Costs: what to really budget

The myth of «it's cheaper»

The cloud isn't automatically cheaper than your own server. For stable and predictable loads, a well-sized dedicated server can be more cost-effective. The cloud is more efficient when use varies: you pay for what you use and stop paying when you don't need it. The mistake is comparing the hardware list price with the first month's bill, without counting everything else.

Hidden costs and how to control them

Cloud bills hide items nobody tells you about in the sales presentation: data egress (what it costs to get information out of the provider), backup replicas, licenses, support and resources left running out of forgetfulness. Controlling them isn't magic: it's right sizing, spending alerts and monthly reviews of what you consume.

The other cost that's forgotten is the project itself: the planning hours, team training and migration tools. A realistic migration budget always includes that line item; if they save it in the proposal, distrust it.

Risks and how to mitigate them

Security and compliance

The cloud doesn't free you from the responsibility of protecting your data: the provider secures its infrastructure, but the configuration, access and backups are your thing (or whoever manages them for you). Before migrating, define who accesses what, activate two-step authentication, encrypt sensitive information and verify that the provider complies with the regulations that apply to your sector.

Vendor lock-in

The more comfortable a provider is for you, the harder it is to leave: proprietary formats, own tools, exit prices. That doesn't mean choosing it is wrong, but that you must decide with your eyes open. Keeping your data in standard formats and documenting the configuration are two habits that ensure you the freedom to move house if someday you need it.

If you prefer not to manage any of this, our IT outsourcing and infrastructure team can handle the migration and subsequent maintenance with the same rigor with which it takes care of other clients' infrastructures.

How to hire help to migrate well

If your company doesn't have a strong IT department, migrating to the cloud alone is risky. Not because the cloud is complicated, but because planning errors are paid dearly and at the worst moment. A good migration partner doesn't sell you the cloud: it does the inventory, tells you what's worth migrating and what isn't, executes in phases and stays afterwards to maintain it.

At TakeYourDesign we do exactly that: we assess your situation, design the migration tailored to you and execute it with testing at each phase. Tell us your case and we'll honestly tell you whether it suits you to migrate, in what order and how much you should budget.