THINK SAFE. THINK ICS.
Modernize the monolith: Transition to microservices
Many companies operate stable monolithic systems that are difficult to expand. Instead of a complete redevelopment, a gradual transition to modular architectures often makes sense, with less risk in ongoing operations.
What is the problem with monolithic systems?
Monolithic architectures bundle many functions into a single application. This can make sense at the beginning, but leads to structural challenges as complexity increases.
Typical problems:
- Changes often affect the entire system
- New functions are difficult to integrate
- Scaling is only possible as a complete system
- Missing or unclear interfaces
- High dependencies between components
These factors make it difficult to further develop and integrate new technologies such as cloud, data platforms or AI.
Monolith or microservices: not an either-or decision
Not every system has to be completely broken down into microservices. In many projects, a hybrid approach in which existing systems are gradually developed further makes sense.
Better expandability
Clearly defined interfaces
Controlled decoupling of functions
Integration of new components
Typical approaches to modernization
The conversion of monolithic systems usually takes place gradually and along clearly defined architectural patterns.
Modularization and decoupling
Existing applications are split into logically separate components. The aim is to reduce dependencies and to be able to develop individual areas independently.
API layer and integration
Existing systems are opened up by creating interfaces. New functions or external systems can be connected via APIs without directly changing the core of the system.
Strangler Pattern
New functions are developed outside the existing system and adopted step by step. This gradually relieves the monolith without abruptly replacing it.
Step-by-step migration to microservices
Individual functions or modules are specifically converted into independent services. These can be developed, operated and scaled independently.
The role of data and platforms
With increasing modularization, the importance of a clear data and integration architecture is growing. Data must be exchanged between systems and processed consistently.
This results in many projects:
- Central data platforms
- Integration layers
- Event-based architectures
These form the basis for further applications such as analysis or machine learning.
Typical challenges in the modernization of monolithic systems
The modernization of monolithic systems is not a purely technical issue.
Additional challenges often arise:
- Ensuring ongoing operations
- Dealing with grown data structures
- Lack of documentation
- High complexity of existing systems
- Integration into existing IT and OT landscapes
Successful modernization therefore requires a structured approach and experience with complex systems.
How ICS works
ICS supports companies in the modernization of existing software systems, from analysis to implementation.
Typical approach:
- Analysis of existing system architecture
- Identification of dependencies and critical components
- Definition of a step-by-step modernization strategy
- Implementation of interfaces, modules or services
- Integration into existing system landscapes
The focus here is on controlled further development that does not jeopardize ongoing operations.
When modernization is worthwhile
Modernization makes particular sense when
- New functions need to be integrated regularly
- Systems are difficult to expand
- Interfaces are missing
- Scaling reaches its limits
- New technologies need to be integrated
Our system is stable. Why should we modernize at all?
Stable does not mean future-proof. If new requirements, interfaces or technologies can only be implemented at great expense, the system quickly becomes a bottleneck. Targeted modernization creates room for manoeuvre again.
How can we modernize without jeopardizing ongoing operations?
Through a step-by-step approach. Critical functions remain stable, while individual parts are specifically outsourced or rebuilt. This means there is no big bang risk.
We have few resources. Is modernization nevertheless realistic?
Yes, if it is approached in a structured way. Instead of a complete reorganization, implementation is carried out in clearly defined steps. This reduces effort and makes it possible to plan progress.
Where do you start?
With an analysis of the existing architecture: which parts are critical, where are dependencies, where does decoupling create the greatest added value? This results in a concrete implementation plan.
What will the transition to microservices bring us in concrete terms?
Faster further development, better scalability and fewer dependencies. Teams can work in parallel and changes can be implemented in a more targeted manner.
How do we prevent the complexity from becoming even greater?
Through clear architectural principles and a clean separation of systems. The aim is not "more technology", but a manageable structure.
How does ICS provide concrete support for modernization?
ICS provides support from analysis to implementation.
- Evaluation of the existing architecture
- Definition of a target structure
- Step-by-step implementation during ongoing operations
The goal is a functioning, maintainable and future-proof system landscape.