15 minutes
ReHosting (a.k.a Lift & Shift)
- NO CODE CHANGE
- It involves moving application without changes.
- In the scenario of Large legacy application migration, the company is looking to impliment the migration & scale quickly to meet a business case.
- The majority of Applications can be Re-Hosted.
ReHosting (a.k.a Lift, Tinker & Shift)
- NO CODE CHANGE
- It is similar to rehosting but it can involve a few cloud optimizations to realize a tangible benifit,
- Optimization is achieved without tangible core architecture.
- Eg. Take on-prem MySQL & re-platform it on RDS or Aurora. This gives improved peformance on RDS without any code change.
Retire
- NO CODE CHANGE
- Thre process of removing apps that are no longer needed.
Retain
- NO CODE CHANGE
- It consists of keeping the applications that are critical for the business in the source environment.
- This includes application that require major refactoring before they can be migrated or work that can be postponed for later.
ReFactor / ReArchitecture
- CODE CHANGE
- It is driven by strong business needs to add features, scales, or peformance that would otherwise be difficult to achieve in applications existing environment.
RePurchase
- The total upfront cost goes up.
- It involves moving from a traditional liscence to SaaS model.
- E.g. a business might choose to implement repurchase strategy by migrating from a CRM (Customer Relationship Management) tool to SalesForce.com