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Modernize your cloud. Maximize business impact.
Cloud migration is a complex process, and ensuring security, scalability, and resilience requires careful planning. The 7 Rs of cloud migration—rehost, replatform, refactor, repurchase, retire, retain, and relocate—provide a structured approach to help businesses navigate this transition successfully.
This blog delves into the 7 Rs of cloud migration, explaining how each strategy plays a critical role in mitigating risks and achieving more stable cloud transitions.
Key takeaways:
- Understanding the 7 Rs: The blog covers the 7 Rs of cloud migration—rehost, replatform, refactor, repurchase, retire, retain, and relocate—providing SMBs with a structured approach to optimize their cloud transition.
- Choosing the right strategy: Each R offers a tailored solution depending on business needs, from quick migrations with rehost to full re-architecture with Refactor.
- Real-world scenarios: The blog explores the best scenarios for each strategy, helping SMBs understand when and why each R is most effective in their cloud journey.
- Balancing costs and performance: The blog highlights the benefits of each R, helping SMBs make informed decisions to balance cost, performance, and scalability during migration.
- Cloudtech’s support: Cloudtech, as an AWS Advanced Tier Services Partner, guides SMBs through the entire migration process, ensuring each step aligns with cloud best practices and long-term success.
The 7 Rs of cloud migration: why they’re essential for SMBs?

The 7 Rs of cloud migration offer a comprehensive framework for SMBs looking to transition to the cloud effectively. Without this structured approach, businesses are more likely to make costly mistakes, like moving outdated systems without considering scalability, leaving security vulnerabilities unaddressed, or over-complicating the migration process by applying the wrong approach to each workload.
These missteps can lead to increased costs, compliance risks, and loss of business agility, ultimately hindering the potential benefits of cloud migration.
The 7 Rs provide a roadmap that helps businesses make informed decisions at each stage of the migration, minimizing risk while maximizing long-term benefits.
1. Rehost: moving applications as-is
Rehosting, also known as "lift and shift," involves migrating existing applications to the cloud without making significant changes to their architecture. This strategy is often required when businesses need to quickly move legacy systems to the cloud for scalability and cost reduction, especially when the existing infrastructure is aging or too costly to maintain.
Best scenarios:
- Legacy applications: Ideal for moving outdated, hard-to-refactor applications to the cloud for scalability.
- Quick migrations: Useful for avoiding on-premises hardware costs or preparing for disaster recovery.
- Disaster recovery: Quickly replicates on-premises systems to the cloud, ensuring business continuity.
Benefits:
- Migrate legacy applications to the cloud rapidly without redesigning or refactoring, reducing migration time.
- No need to modify application code, allowing business operations to continue smoothly during the migration.
- Use Amazon EC2 for automatic scaling of resources based on usage, ensuring system performance during high-demand periods.
Example: Before migrating, a healthcare SMB ran its EHR system on legacy on-premises servers, facing performance bottlenecks during peak times and high maintenance costs. By rehosting the system to Amazon EC2, the SMB gains immediate scalability, allowing the system to automatically scale with EC2 Auto Scaling during high-demand periods, improving performance and reducing infrastructure overhead.
The migration also uses AWS’s security features, like IAM and KMS, to ensure compliance with HIPAA. This approach gives the SMB a cost-effective solution to manage growing patient data while maintaining system stability and reliability.
2. Replatform: minor modifications for optimization
Replatforming, also known as "lift, tinker, and shift," involves migrating applications to the cloud with minimal changes to optimize them for the cloud environment. This strategy is often required when businesses want to quickly take advantage of cloud benefits, such as scalability and cost savings, without undergoing a full redesign.
Unlike rehosting, this approach provides a quicker optimization path while maintaining the existing architecture largely intact. Replatforming allows businesses to gain the advantages of cloud infrastructure more efficiently and with fewer disruptions to their operations.
Best scenarios:
- Legacy applications with optimization needs: Ideal for applications that require small modifications to benefit from cloud capabilities like scalability or performance without a full redesign.
- Performance and cost optimization: Suitable for businesses that want to enhance performance or reduce costs by shifting to cloud-managed services, but don’t need a complete overhaul.
- Adoption of cloud-native features: When businesses want to move to the cloud quickly while utilizing features like managed services or auto-scaling.
Benefits:
- Provides a quicker transition compared to full refactoring, while using cloud-native features like Amazon RDS for databases and Amazon EC2 Auto Scaling for compute.
- Moves to cloud-managed services like Amazon RDS can reduce the operational overhead of maintaining databases and improve overall system reliability.
- Helps reduce on-premises hardware costs and improve resource utilization by using elastic cloud infrastructure.
Example: A healthcare SMB running an on-premises EHR system decides to Replatform by migrating their database to Amazon RDS for PostgreSQL, while keeping the application code intact. This change enables the SMB to take advantage of RDS’s managed features, such as automated backups, patch management, and scaling.
The system continues to run on Amazon EC2 instances, but with a more efficient, cloud-optimized database that reduces the management overhead. The migration also integrates AWS IAM for secure access and Amazon KMS for encryption, ensuring HIPAA compliance while optimizing infrastructure and improving reliability.

3. Refactor: re-architect for cloud optimization
Refactoring involves re-architecting an application to fully optimize it for the cloud. This strategy is required when businesses need to fully utilize cloud capabilities for long-term scalability, performance, and cost efficiency. It often involves significant changes to the application’s codebase, such as transitioning to microservices, integrating serverless architectures, or adopting cloud-specific databases and storage solutions.
These changes allow the application to take full advantage of the cloud’s elastic nature, automated scaling, and advanced services. Refactoring is necessary when legacy systems can no longer meet business demands, when ongoing maintenance becomes costly, or when optimization for cloud-native features is crucial to support future growth.
Best scenarios:
- Complex applications: Ideal for applications that need a complete redesign to take full advantage of cloud scalability and flexibility.
- Long-term scalability: Suitable for SMBs planning for future growth and requiring applications built to scale efficiently in the cloud.
- Maximizing cloud-native features: When businesses want to update their architecture to fully benefit from modern cloud solutions like AWS Lambda, Amazon S3, and containerization with Amazon ECS.
Benefits:
- Optimizes cloud performance, scalability, and cost-efficiency through cloud-native services like Amazon RDS, AWS Lambda, and Amazon S3.
- Provides long-term value by reworking applications for cloud environments, reducing manual management and improving resource utilization.
- Increases agility and shortens time to market by adopting modern cloud architectures like microservices or serverless computing.
Example: A healthcare SMB with an on-premises EHR system decides to refactor by moving to a microservices architecture. The system is split into smaller services hosted on Amazon ECS containers, and the database is migrated to Amazon RDS for improved performance and scalability.
The SMB also adopts AWS Lambda for serverless functions, such as automated patient notifications, reducing manual effort and increasing responsiveness. This refactor allows the healthcare provider to scale easily, improve operational efficiency, and ensure secure access and encryption with AWS IAM and KMS for compliance.
4. Repurchase: replace with cloud-native solutions
Repurchasing involves replacing existing applications or systems with cloud-native alternatives, such as transitioning from on-premises software to a software-as-a-service (SaaS) solution. This strategy is required when legacy systems are outdated, costly to maintain, or no longer align with business needs, and when a more modern, scalable cloud-based solution is available.
This simplifies operations, reduces infrastructure costs, and offers better performance by using cloud-native applications that continuously evolve and improve.
Best scenarios:
- Outdated or incompatible systems: Ideal when legacy systems cannot easily integrate with modern cloud technologies, and a SaaS or cloud-native solution offers better functionality.
- Cost reduction and simplicity: Suitable for SMBs looking to minimize IT management by replacing on-premises systems with fully managed cloud solutions.
- Improving security and compliance: When businesses need to replace systems with cloud-native solutions that provide built-in security, compliance, and automatic updates.
Benefits:
- Moving to a fully managed cloud service like Amazon WorkDocs or Amazon WorkMail eliminates the need for in-house maintenance and server management.
- Cloud-native applications continuously evolve with new features, improving productivity and scalability without manual updates.
- Cloud-native solutions like Amazon RDS or Amazon S3 provide scalability, performance optimization, and built-in security.
Example: A healthcare SMB running an on-premises EHR system decides to Repurchase by migrating to Amazon WorkDocs for secure document management and Amazon WorkMail for managed email services. This transition eliminates the need for local server maintenance, reduces storage costs, and enhances collaboration across the organization.
By moving from on-premises servers to these managed services, the SMB also benefits from automatic updates, security features like AWS IAM for access control, and compliance with HIPAA standards, ensuring both operational efficiency and data security.

5. Retire: decommission unused systems
Retiring involves decommissioning legacy applications or systems that are no longer needed or useful to the business. This strategy is required when certain applications or hardware have become obsolete, underperforming, or redundant, and continuing to maintain them only incurs unnecessary costs and complexity.
Retiring these systems helps businesses reduce their infrastructure footprint, lower operational costs, and focus resources on more valuable areas.
Best scenarios:
- Obsolete systems: Ideal for systems that are no longer in use, have been replaced by more efficient cloud-based solutions, or have become too costly to maintain.
- Cost reduction: When maintaining legacy systems or hardware provides minimal value and adds to IT overhead, retiring these systems can free up valuable resources.
- Streamlining operations: Suitable when SMBs want to reduce complexity by eliminating redundant applications or services that no longer align with business goals.
Benefits:
- Eliminating outdated systems cuts down on maintenance, licensing, and hardware costs.
- Reduces complexity by removing unused systems, making it easier to manage remaining services and focus on more critical business applications.
- Frees up resources and personnel to focus on newer, more valuable technologies and business priorities.
Example: An SMB in healthcare with an old on-premises document management system that has been replaced by Amazon WorkDocs decides to Retire the legacy system. By decommissioning the old solution, the SMB eliminates the cost of hardware maintenance, software updates, and security patches. Moving entirely to Amazon WorkDocs simplifies document storage, improves collaboration, and ensures compliance with HIPAA. The business can now focus on more strategic initiatives, such as optimizing patient care systems, rather than maintaining outdated infrastructure.
6. Retain: keep critical on-premises systems
Retaining involves keeping certain applications or systems on-premises while migrating other components to the cloud. This strategy is required when specific applications have high security, performance, or compliance needs that make cloud migration challenging. By retaining certain critical systems, SMBs can maintain control over legacy infrastructure or systems that have specific latency or integration requirements.
Best Scenarios:
- Compliance and regulatory requirements: Ideal for SMBs in highly regulated industries (e.g., healthcare, finance) where certain systems need to remain on-premises to comply with strict data governance or security standards.
- Performance constraints: Suitable when certain applications have latency or performance requirements that are best served by keeping them on-premises or within a specific geographic region.
- Integration with legacy systems: When applications rely heavily on legacy systems that are not yet compatible with cloud services, retaining these components ensures business continuity without disruption.
Benefits:
- Keeps critical applications under direct management, allowing businesses to maintain tight control over security, configurations, and compliance.
- Retaining systems on-premises can provide the necessary low-latency performance required for certain applications, especially those dealing with real-time data.
- Ensures that systems which must interact with legacy on-premises infrastructure continue to function properly without forcing a disruptive migration.
Example: A healthcare SMB may retain its EHR system on-premises due to strict HIPAA compliance requirements that mandate certain data be stored on private servers. Meanwhile, the business migrates its file storage and patient communications to Amazon S3 and Amazon WorkMail for better scalability and security. By retaining the EHR system on-premises, the SMB ensures it remains compliant while leveraging cloud technologies for other operations, balancing control with modern cloud benefits.
7. Relocate: move to a different cloud provider or region
Relocation involves moving workloads to a different cloud provider or to a different region within the same cloud provider. This strategy is required when businesses need to optimize for performance, cost, or compliance by choosing a more suitable cloud provider or region. Relocating allows SMBs to improve service availability, reduce latency, or meet regulatory requirements specific to certain regions or cloud platforms.
Best scenarios:
- Performance optimization: When an SMB's current cloud region or provider does not meet performance requirements, such as high latency or resource availability, relocating to a new region can improve speed and responsiveness.
- Cost optimization: If the SMB finds that costs are higher in a particular region or with a specific cloud provider, relocating workloads can help reduce operational expenses by taking advantage of more affordable pricing structures.
- Compliance and data sovereignty: For businesses that must meet specific regulatory requirements (such as GDPR, HIPAA, or data residency laws), relocating to a region or provider that complies with those standards ensures continued compliance.
Benefits:
- Relocating to a more suitable region or cloud provider can help reduce latency, improve user experience, and ensure faster processing times.
- By moving to a more cost-effective cloud region or provider, SMBs can significantly lower cloud expenditures and optimize their cloud spend.
- Relocation helps ensure that systems remain compliant with regional laws and regulations, offering better data governance and security.
Example: An SMB in healthcare hosting its application in an AWS region with high latency decides to Relocate its workloads to a closer AWS region, reducing response times for real-time patient data access. Additionally, the business may choose to move to a cloud provider offering better pricing or features that better align with their needs. This move improves the overall user experience for healthcare providers and patients, while ensuring compliance with local data residency requirements under HIPAA.
While implementing these 7Rs, working with an AWS partner is advisable. They bring expertise to ensure secure, efficient, and optimized migrations, helping businesses avoid pitfalls and fully utilize AWS services for scalability and performance.
How does Cloudtech help SMBs successfully implement the 7 Rs of cloud migration?
Dealing with the complexities of cloud migration can be daunting for businesses, especially when considering scalability, security, and cost optimization. Cloudtech, as an AWS Advanced Tier Services Partner, offers SMBs a structured, cloud-first approach to the 7 Rs of migration.
With deep expertise in AWS services, Cloudtech makes sure each migration strategy, whether rehosting, replatforming, or refactoring, aligns with business goals and maximizes cloud benefits.
What Cloudtech delivers:

- Secure-by-design cloud migrations: Cloudtech helps SMBs establish secure, compliant AWS environments by using AWS Control Tower to set up secure landing zones, ensuring governance and compliance right from the start. IAM baselines and AWS CloudTrail are used to maintain access control and track activities, ensuring a secure and auditable migration process.
- Tailored migration strategies: Whether Rehost, Replatform, or Refactor, Cloudtech applies AWS services like Amazon EC2 for rehosting, Amazon RDS for optimized databases during replatforming, and AWS Lambda for serverless functions when refactoring. Cloudtech's approach ensures that each strategy is optimized for scalability and performance.
- Post-migration optimization and support: Once migration is complete, Cloudtech uses AWS Security Hub and AWS Trusted Advisor to continuously assess the environment, identify any misconfigurations, and optimize cloud resources. This ensures ongoing efficiency and resilience while maintaining the security and compliance of the SMB’s cloud infrastructure.
With Cloudtech’s expertise and AWS tools, SMBs gain the guidance and support needed to successfully execute the 7 Rs, ensuring a smooth transition to the cloud with minimal risk and maximum benefit.

Closing thoughts
Whether rehosting legacy systems, replatforming for better performance, or refactoring for long-term scalability, the right approach is crucial. Without a structured migration strategy, businesses risk inefficiencies, security gaps, and higher operational costs.
With Cloudtech’s expertise as an AWS Advanced Tier Services Partner, SMBs can confidently navigate each of the 7 Rs, using AWS tools like Amazon EC2, Amazon RDS, and AWS CloudFormation to optimize their cloud infrastructure. Cloudtech ensures that every migration step is tailored to specific business needs, minimizing risk and maximizing cloud benefits.
Ready to simplify your cloud migration with the 7 Rs? Connect with Cloudtech.
FAQs
1. How do businesses decide between Rehost and Replatform for my SMB?
For SMBs, Rehost is ideal when businesses need a quick and straightforward migration without altering the existing application architecture. Replatform is better if they want to optimize the system for the cloud without a full rebuild, ideal for applications that need better performance or cost-efficiency with minimal changes.
2. Can SMBs start with a simple migration strategy and move to more complex ones later?
Yes, SMBs can begin with Rehost for a fast migration and later move to Replatform or Refactor as they scale and need more cloud-native features. Cloudtech guides SMBs through this phased approach, ensuring each step aligns with business growth and cloud optimization.
3. What are the security risks during the cloud migration process?
Security risks can arise from misconfigured settings, such as improper IAM roles or unencrypted data during migration. Cloudtech ensures that security best practices, such as using AWS IAM, KMS, and CloudTrail, are implemented at each stage, helping SMBs secure their cloud environments from day one.
4. How long does it take to complete a cloud migration with Cloudtech?
The timeline depends on the migration strategy chosen. Rehost typically offers the fastest path, while Refactor may take longer due to the need for re-architecting. Cloudtech works closely with SMBs to set realistic timelines and ensures minimal disruption during the transition.
5. Can Cloudtech help optimize cloud costs during migration?
Absolutely. Cloudtech uses AWS Cost Explorer, AWS Trusted Advisor, and other tools to analyze usage and provide cost optimization recommendations. Whether it's Replatforming or Rehost, Cloudtech ensures that SMBs move to the cloud in a way that is not only secure but also cost-effective.

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