Microservices gets it WRONG defining Service Boundaries

TL;DR

Physical and logical boundaries in software architecture are often confused, but understanding their distinction is crucial to avoid unnecessary complexity and improve system design.

Transcript

hey everybody it's derek colemartin from codeopinion.com physical boundaries aren't logical boundaries okay great what does that mean and why does it matter well it matters because they're often considered to be the same thing and this can lead to unneeded complexity an example of this are micro services let me explain this video is brought to you ... Read More

Key Insights

• 👨‍💼 Physical boundaries involve the communication between networked components, while logical boundaries define business capabilities and data ownership.
• 🥺 Treating physical and logical boundaries as the same thing can lead to unnecessary complexity and limited flexibility.
• 🔂 Composing logical boundaries into a single physical boundary can improve system efficiency and simplify deployment.
• 😕 Confusing physical and logical boundaries can result in data consistency issues and tightly coupled services.
• 🎨 Understanding the difference between physical and logical boundaries is crucial for effective system design and development.
• ❓ Logical boundaries can have multiple physical components, and a physical boundary can consist of multiple logical boundaries.
• ❓ Defining boundaries accurately can be challenging, but distinguishing between physical and logical helps clarify system architecture.

Questions & Answers

Q: What is the difference between physical and logical boundaries in software architecture?

Physical boundaries involve the communication between different components in a system, such as services, databases, and UI components, while logical boundaries define the business capabilities and data ownership.

Q: Why is it important to distinguish between physical and logical boundaries?

Knowing the difference allows for more flexibility in system design, as logical boundaries can have multiple physical components and vice versa. Treating them as the same can lead to unnecessary complexity and limited scalability.

Q: How can the confusion between physical and logical boundaries affect system design?

It can lead to difficulties in defining boundaries and result in the need to make RPC calls or use event-carried state transfer, which can introduce data consistency issues and increase coupling between services.

Q: What is the advantage of composing logical boundaries into a single physical boundary?

Composing logical boundaries into a single physical boundary can simplify system architecture, reduce network communication, and improve performance. It allows for more efficient interaction between components and easier deployment.

Key Insights:

• Physical boundaries involve the communication between networked components, while logical boundaries define business capabilities and data ownership.
• Treating physical and logical boundaries as the same thing can lead to unnecessary complexity and limited flexibility.
• Composing logical boundaries into a single physical boundary can improve system efficiency and simplify deployment.
• Confusing physical and logical boundaries can result in data consistency issues and tightly coupled services.
• Understanding the difference between physical and logical boundaries is crucial for effective system design and development.
• Logical boundaries can have multiple physical components, and a physical boundary can consist of multiple logical boundaries.
• Defining boundaries accurately can be challenging, but distinguishing between physical and logical helps clarify system architecture.
• Using event-driven architecture and messaging can mitigate the drawbacks of treating physical and logical boundaries as the same.

Summary & Key Takeaways

• Physical and logical boundaries are often considered the same thing, leading to complexity in system design.

• In reality, physical boundaries involve the communication between services, databases, and UI components over the network, while logical boundaries define the business capabilities and data ownership.

• Treating physical and logical boundaries as the same thing limits flexibility, whereas understanding their distinction allows for more efficient system design and development.