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  • Writer's pictureDr. Bohdan Tanyhin

On-premises and legacy migration to the cloud: Modern DevOps Strategies series

The world’s macroeconomic climate has changed lately. As a result, 33.4% of companies started planning to migrate from legacy enterprise software to cloud-based tools. Another 32.8% of enterprises expect to migrate on-premises workloads to the cloud as soon as possible. That’s why cloud giants are increasing their use of cloud-based services and products on the market. 


To go with the trend, most of the companies adhere to the best DevOps strategies of migration. And, it’s no wonder. DevOps practices allow faster and more efficient solutions to different migration challenges. One of them covers on-premises and legacy software. 

By now, there’re 7 cloud migration strategies called the 7 R’s. E.g., Rehost, Relocate, Replatform, Refactor, Repurchase, Retire, and Retain. Let’s discuss what they can offer in detail.  

Rehost Migration Strategy   

The strategy allows companies to move on-premise applications and everything belonging to these applications to the cloud easily. While the core infrastructure stays the same, rehosting helps transfer all the data and workflows of an application to the cloud services that are equal to the workload’s actual storage, networking, and computing requirements. If there is a lack of in-house or cloud-native experts in the enterprise, it is still possible to perform rehosting as it is super easy to carry out.  

Relocation Migration Strategy 

Relocation allows migrating workloads without altering operations, rewriting the application source code, or getting specific hardware. An organization can migrate a collection of servers from an on-premises platform (Kubernetes or VMware) to a cloud version of the same platform. Relocating decreases downtime and disruption and clients remain connected throughout the whole migration process. 

Replatform Migration Strategy  

Replatform stands for platform optimization to adjust to cloud-native capabilities. It is one of the perfect ways to move an application to the cloud, while its source code and core architectural features remain the same. Therefore, a legacy application can still operate and be compliant with and secure according to cloud-based requirements. In the end, you will receive flexibility, agility, and ability to automate workloads as well as increase  your ROI. As the source code is not to be rewritten and, thus, teams don’t need to be extra trained, enteprises can save both time and costs dedicated to migration.  

Refactoring Migration Strategy  

It is a complex migration option because it requires workload rearchitecting. This is needed to support cloud capabilities. The only drawbacks associated are its cost, time, effort, and resources. But this migration type is worth it due to stability, continuous functioning, and support of serverless computing, autoscaling, and workload balancing with possible distribution. 


How exactly does refactoring work? Let’s take a monolithic application and break it into microservices to promote automation. It might appear costly, but still effective to rearchitect an application into a service-oriented architecture. The cost to operate the legacy framework will be higher.

Repurchase Migration Strategy  

The cloud provider offers third-party managed services you can use to substitute your internally administrated systems. With repurchasing teams get a SaaS subscription model instead of their legacy systems. So, operational efforts of infrastructure management for onsite teams are being reduced, and you generate revenue. Via repurchasing you make the process of migration easier, with no potential downtime, enhanced efficiency, scalability and better regulation of the processes.  

Retire Migration Strategy   

If there are legacy applications that have to be discontinued or optimized as they are useless in production, the strategy of retirement is your top choice. It allows adopting cloud technologies and getting rid of inefficient legacy frameworks.  

Retain Migration Strategy  

Unlike the previous strategy, this one helps in cases, where legacy frameworks can’t be retired and still have to operate within an organization. Therefore, enterprises retain the application that has to work and will transfer it to the cloud if there is an immediate business value to do so. 

Migration Models Use Cases  

Before choosing an optimal model that will help your enterprise migrate on-premises or legacy software in the best possible way, look through the following table with migration models use cases. The table will show details on which model to use and how this model can benefit your enterprise.  

Sencury offers Cloud Migration Services      

Cloud migration is a complex procedure. It has many requirements, among which to reach business objectives. To ensure this task will be carried out efficiently it is vital to perform a thorough analysis of ongoing challenges and map their changes. Your particular strategy of migration should be selected very carefully. What’s more, it has to be according to the best DevOps practices.


Sencury can become your top migration assistant. Contact us now to receive a consultation of a cloud migration specialist at Sencury. Make complex migrations easier with Sencury! 


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