stranglerfigtilnærming

Strangler Fig Approach is a software development strategy used to gradually replace an existing system with a new one. The term is inspired by the strangler fig plant, which grows around an existing tree, eventually strangling and replacing it. This approach is particularly useful in scenarios where a legacy system needs to be modernized or replaced, but a direct cutover is not feasible due to various reasons such as cost, risk, or operational constraints.

The Strangler Fig Approach involves incrementally developing a new system alongside the existing one. The new system starts by replicating the functionality of the old system, gradually taking over more responsibilities as it matures. This is achieved by creating new features in the new system and gradually redirecting traffic from the old system to the new one. Over time, the old system is phased out, and the new system becomes the primary system.

This approach offers several benefits. It allows for a more controlled and manageable transition, reducing the risk associated with a big-bang replacement. It also enables the new system to be developed and tested incrementally, leading to better quality and more reliable software. Additionally, it allows for the old system to continue functioning while the new one is being developed, ensuring business continuity.

However, the Strangler Fig Approach also has its challenges. It requires careful planning and coordination to ensure that the new system can seamlessly take over the functionality of the old system. It also requires a significant amount of effort to maintain and synchronize the two systems during the transition period. Furthermore, it may not be suitable for all scenarios, such as when the old system is highly complex or when the new system requires a complete overhaul of the existing architecture.