Cloud Migration Strategy – What Are Your Options?

Cloud Migration Strategy Roadmap
May 26, 2019

To get various benefits of cloud migration, you need to move all your applications to the Cloud. And to ensure a smooth transition of your applications from your in-house physical servers to the cloud infrastructure, you need to have a well-planned cloud migration strategy in place. When the CIOs decide to cloud migration, the cloud architects or the in-house IT team of the companies faces a lot of challenges in terms of choosing the right strategy to migrate their applications to the Cloud, given the fact that they need to consider the individual business requirements and the IT goals and objectives of their companies while ensuring that the process of migration doesn’t affect the operations of their company and carries the minimum risk.

This article outlines 5 essential cloud migration strategies, as Richard Watson, Research Director of Gartner, mentioned at the Gartner Application Architecture, Development & Integration Summit.

5 Important Cloud Migration Strategies are :

1. Rehost the applications on Infrastructure as a Service (IaaS)

2. Refactor/Re-Architect the applications for Platform as a Service (PaaS)

3. Revise the applications for IaaS or PaaS

4. Rebuild the applications on PaaS

5. Replace the applications with Software as a Service (SaaS)

None of the above cloud migration strategies stated by Watson offers a silver bullet. Hence, the cloud architects of the in-house IT teams of the companies need to evaluate and understand their cloud migration process from various perspectives and criteria to minimize the risk and downtime and leverage the maximum advantage of the Cloud to achieve the business goals and cost limitations of their companies. Here is an overview of all 5 cloud migration strategies suggested by Watson:

1. Rehost Your Applications on Infrastructure as a Service (IaaS)

Rehosting your applications on an Infrastructure as a Service (IaaS) platform is the best cloud migration strategy for companies migrating to the Cloud as quickly as possible. While executing this cloud migration strategy, you redeploy your applications to a different hardware environment by changing their infrastructure configuration. As mentioned, the most significant advantage of this cloud migration strategy is that it allows you to move your applications to the Cloud quickly without changing their architecture, which also gives you the disadvantage of not availing the benefit of scalability offered by your cloud computing services provider.

2. Refactor Your Applications for Platform as a Service (PaaS)

Another cloud migration strategy companies can choose to move their applications to the Cloud is refactoring or rearchitecting their applications for Platform as a Service (PaaS)This strategy suits companies who want to reuse the languages, frameworks, and containers they have invested in while leveraging the code they consider strategic. The disadvantage of this strategy includes missing capabilities, transitive risk, and framework lock-in. Hence, while choosing this strategy, the companies should be aware that some of the capabilities their developers depend on could be missing from the PaaS offering as its market is still in its early stage.

3. Revise Your Applications for IaaS or PaaS

Revising the applications for IaaS or PaaS is suitable for those companies who want to optimize their applications to leverage the cloud features of the provider’s Infrastructure. The drawback of this strategy is that it not only consumes a lot of time but also requires upfront expenses first to revise (modify or extend) the existing code base of their applications to support legacy modernization requirements and then use Rehost or Refactor (Rearchitect) cloud migration strategy to move the applications to the Cloud.

4. Rebuild Your Applications on PaaS

When the companies choose to rebuild their applications on PaaS, they need to discard the code and frameworks of their existing application, followed by the re-architecting or refactoring their applications to move them to the Cloud. The advantage of this cloud migration strategy is that it allows the companies to take maximum advantage of the various innovative features of the provider’s cloud platform. This strategy also helps the companies improve their developers’ productivity as they access the tools that allow customization of their application templates and data models, metadata-driven engines, and the communities that supply pre-built components. The main disadvantage of this cloud migration strategy is that it forces the companies to switch or potentially abandon some or all of their application assets if the provider makes a pricing or technical change or breaches the service level agreement (SLA), which they can’t afford to accept.

5. Replace Your Application with Software as a Service (SaaS)

The strategy of replacing the applications with Software as a Service (SaaS) is suitable for those companies who want to discard their existing application or a set of their applications to use better commercial Software delivered as a service. The advantage of this cloud migration strategy is that it allows the companies to avoid investment in mobilizing their development team when the requirements of their business operations change very quickly. The disadvantage of the strategy includes inconsistent data semantics, data access issues, and vendor lock-in.

Important Tip for Choosing a Cloud Migration Strategy

When you decide to migrate your applications to the Cloud, make sure that your decision is not taken in a rush to join the cloud race. Instead, you should go for cloud migration only if it helps in the optimization of the following:

  1. Your application’s performance and maintenance
  2. The cost of your running or maintaining your in-house IT infrastructure
  3. Your applications’ contribution to your company’s business and IT Goals

Recommended Reading:

  1. The Essentials Of An Effective Cloud Migration Strategy
  2. Best Practices To Revamp Your Cloud Migration Strategy    

Still, have any doubts or queries?

Rapyder Can Help! Feel free to call Cloud migration experts of Rapyder Cloud Solutions on +91-073386 86644 today for their professional assistance in choosing or executing your cloud migration strategy. Rapyder is one of the leading providers of cloud migration service in India.  We have helped many of our clients to move their applications to the Cloud while considering the unique requirements of their business to create the best cloud migration strategy for their applications. We also recommend best tools to our clients to help them manage their applications in the Cloud. For more information about our Cloud migration service, visit our website

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