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From Monolith to Microservices

Sam Newman

Microservices are all the rage at the moment, but many people focus on what they look like and how they work once you’ve got them. Suppose your organization has a very different type of architecture, however, how do you move from one to the other?

Join Sam Newman, author of Building Microservices, for an in-depth exploration into how to go about breaking down monolithic systems into microservices. Sam will cut through the buzzwords and be honest about the pros and cons of adopting an architecture that might be radically different from what you have now. By the end of this course, you’ll have a solid grasp of the principles and a concrete set of tools for breaking apart your own systems.

What you'll learn-and how you can apply it

  • What microservices are, and whether or not they’re right for you
  • How to structure a transition from a monolithic system to microservices
  • How to find boundaries for new services
  • How to identify potential risks and manage outcomes

This training course is for you because...

  • You’re a CTO, architect, or tech lead who wants to understand whether microservices are the right choice for your organization and how to take advantage of them
  • You’re a developer looking for help to break down your monolithic systems
  • You want advice on how to implement a sane, balanced approach to moving to microservices


  • A good understanding of your current system architecture is very useful
  • Some knowledge of microservices is useful, but not essential

Suggested reading:

Building Microservices

Microservice Architecture

Recommended Preparation

What are microservices?

About your instructor

  • Sam Newman is interested in how different aspects of technology intersect, from development, to ops, to security, usability, and organizational structures. After 20 years in the industry, Sam now runs his own consulting and training company Sam Newman and Associates, focusing in the area of Microservices, Cloud and CI/CD.

    Sam has worked with a variety of companies across multiple industries all over the globe, often with one foot in the developer world, and another in the IT operations space. He has written articles, presented at conferences, and sporadically commits to open source projects. Sam is the author of the bestselling Building Microservices from O'Reilly.


The timeframes are only estimates and may vary according to how the class is progressing

Day One


  • What are microservices?
  • Why might you want them?
  • Why microservices could be a terrible idea, or why monoliths sometimes rock!
  • Why don’t we normally do microservices?

Planning a transition to microservices - Where do you start? - Goal setting—why are you doing this and when will you be done? - Big bang rewrite versus incremental adoption

Splitting out stateful functionality - Single DB versus multiple DB - Data refactoring patterns - Dual data storage

Day Two

Migrating A Running System - Branch by abstraction - Team facades - Event decorators - Handling user interfaces

Build and deployment issues, such as - How to structure repositories (monorepos vs per-service repos) - CI structures - Deployment topology

Vital changes to monitoring approaches

  • What does healthy mean in the new world?
  • Correlation IDs
  • Improved dashboards