Key takeaways
- An on-premises model offers control, but requires hardware, power and administration.
- The cloud makes scaling easier, but access and costs still need to be controlled.
- A hybrid model can be practical when some applications must remain on site.
- The decision should be based on application requirements, RTO/RPO and total cost of ownership.
Why does the choice of model matter?
Moving a system to the cloud does not remove administrative responsibilities. Equally, an on-premises server is not automatically more secure. The most important considerations are application dependencies, connectivity, backups and the skills of the people maintaining the environment.
Comparing the models
On-premises server
Full control and predictable infrastructure. It requires investment, a server room, backups and a contingency plan.
Cloud
Flexible resources and easier remote working. Costs rise with usage, while the business remains responsible for configuring access.
Hybrid
Combines on-premises systems with cloud services. It provides flexibility, but makes integration more complex.
How should you decide?
- Do the applications have requirements for an on-premises environment?
- Does the business have a stable, redundant internet connection?
- How quickly must a key service be restored?
- Can the team monitor and secure the chosen model?
- Does the cost also include migration, backups, licences and administration?
It is usually best to begin by inventorying dependencies and calculating the total cost over three to five years.
Risks and security
Every model requires MFA, access segmentation, encryption, monitoring and an independent copy of the data. In the cloud, permissions and budgets require additional control; on premises, power, temperature and physical access must be managed.
Step-by-step action plan
- List systems and data. Define owners, dependencies and availability requirements.
- Compare the options. Include the costs of hardware, services, migration and maintenance.
- Choose a pilot. Move or launch a less critical system and measure the results.
- Prepare recovery. Test the backup and the rollback procedure for an unsuccessful change.
- Document the environment. Record access, configuration and responsibilities.
Checklist
- We know the critical systems and their owners.
- We have defined RTO and RPO.
- A backup operates outside the primary environment.
- Administrative permissions are restricted.
- The solution's cost is monitored.
- The migration plan includes testing and a rollback option.
Frequently asked questions
Is the cloud always cheaper?
No. Cost-effectiveness depends on workload, data retention, licences and administration time.
Is a hybrid model secure?
It can be, provided that connections, identities and permissions are designed and monitored as a whole.
When is an on-premises server needed?
When an application requires low latency, operation without internet access or an on-premises licensing system.
Would you like to choose a model suited to your business?
We can analyse your current environment, costs and requirements, then prepare a well-founded plan for change.
Let's talk about your IT