Node.js is well-suited for building scalable micro-services as it allows for building single-threaded and event-driven applications. Micro-services break up monolithic functionality into smaller, independently scalable services that communicate through APIs. While micro-services improve scalability, they also multiply lower-level design problems across codebases. Async libraries help flatten asynchronous code and handle promises to deal with asynchronous I/O in a scalable way. Process managers like pm2 allow scaling node.js micro-services across clusters.

2. Node.js
Scalable
Micro-Services

3. Server side javascript
Makes it great for IO bound tasks
Single threaded
Event driven
Best for asynchronous things

4. What do you think when you hear
‘scalable’?

5. What do I think when I hear
‘scalable’?

6. Will this code scale with your employees?

8. What is a Micro-Service?
Separate monolithic functionality into smaller parts.
MY AWESOME
MONOLITH
git
git git gitgit
svn? git git
Design Pattern

9. Then distribute those parts
in an individually scalable fashion,
behind an API Facade.
service
API Facade
service serviceservice service serviceservice

10. Room
Available
?
Monolithic
API
Payment
3rd
party
3rd
party
Translation
3rd
party
Client request Server response

11. Room
Available?
API Facade
Payment Translation
3rd
party
3rd
party
3rd
party
Client request Server response

12. With a powerful pattern comes great responsibility

13. Not everything can / should be microtized
Lower level design problems
will be multiplied
across codebases

16. What is the secret sauce?

18. The Pyramid Of Doom

20. How to:
DEAL WITH IT

21. Named Functions
Flatten Dat Code

22. Async Library
Also Flattens Dat Code

23. No Asynchronous IO?

24. .then(what the function (do) {
we(do)……..

25. • Pending
• Fulfilled
• Rejected

26. Basic Promises

27. Advanced Promising

28. BONUS SLIDE

29. Next generation

30. Scaling your micro services?

31. Cluster

33. pm2

35. Finding the right libraries
Q Bluebird