A very short Chapter 2 is about how to make rough estimates to start from the most important parts when designing the software.
Some concepts that EVERY software developer should know:
“Power of two” Standard latency numbers! How fast is memory, how slow is disk, etc… Availability numbers What are key metrics you should think about These concepts and numbers are disclosed in chapter two of the book:
A great generic plan for scaling any app from zero to millions of users.
Single server setup Selection and usage of database Vertical scaling vs horizontal scaling approaches. And why you should prefer horizontal Adding load balancer for horizontal scaling Adding database replication for horizontal scaling Adding cache Adding CDN Stateless vs Stateful architecture and using external state storage Adding extra Data Centers Adding Message queue Adding Logging, Metrics, and Automation Scaling database (sharding) and futher steps… All of these is carefully but briefly disclosed in the Chapter 1 of the book:
Principles of Microservice Deployment Differentes between Continuous integration (CI), Continuous delivery and Continuous deployment. Deployment patterns:
The Basic Full-Stop Deployment Pattern The Rolling Update Pattern The Breaking Schema Change Pattern: two options here - Eventual Migration and Synchronized Migration The Blue-Green Deployment Pattern All of these is disclosed in the Chapter 16 of the book:
“Building Event-Driven Microservices: Leveraging Organizational Data at Scale” by Adam Bellemare
Sharing my mind map with all the details as usual:
Testing event-driven solutions is a challenging task. It includes:
Common principles Unit testing: stateless and stateful Testing the Topology (I bet you didn’t do it! ;) Testing Schema Evolution and Compatibility Integration testing: Local, Remote and Hybrid - a set of common sense considerations not to forgot about Choosing the testing strategy All of these is disclosed in the Chapter 15 of the book:
“Building Event-Driven Microservices: Leveraging Organizational Data at Scale” by Adam Bellemare
