The document discusses two types of microservices: app-centric and job-centric. App-centric microservices are for real-time requests and responses, while job-centric microservices are for asynchronous background processes. It also examines different characteristics of microservices like how they are deployed, invoked, routed, scaled, execute, and get data depending on whether they are app-centric or job-centric. The document promotes using job-centric microservices for event-driven computing, batch processing, and scheduled jobs in cloud native applications.

1. The Fork in the API
App-centric vs Job-centric Microservices
Ivan Dwyer | Head of Business Development | Iron.io | @fortyfivan

2. “Loosely coupled service oriented
architecture with bounded contexts”
- Adrian Cockroft
characteristics of a microservice

3. a containerized workflow sets the stage
runshipbuild
Dockerfile Docker Image Docker Container Docker Daemon
?

4. “The intended lifecycle of the workload itself
determines how a microservice should behave”
- Me
but what about its behavior?

5. a further distinction needs to be made
App-centric
Real-time requests
Job-centric
Background processes

6. how does it run?
Synchronous Asynchronous
request 1
response 1
request 2
response 2
waitwait
request 1
response 1
request 2
response 2

7. how is it deployed?
Staged Uploaded
Runtime Image
Repo
push upload

8. how is it invoked?
Request Event
request
Client Event
trigger
response

9. how is it routed?
Load Balancer Queue
Load
Balancer

10. how does it fail?
Reroute Retry
Load
Balancer
retry

11. how does it scale?
Elastic Concurrent
Load
Balancer

12. how does it execute?
Long Running Ephemeral
start stop
process

13. how does it get data?
Connection Payload
DB

14. when to do what?
Stream processing
Real-time analytics
Client requests
Database queries
User facing processes
Scheduled jobs
Batch processing
Transactions
Mobile backends
ETL pipelines

15. event-driven computing for cloud native applications
queue, schedule and execute
job-centric microservices at scale
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