How to deal with "state" in a distributed environment

1. State of yer WAN
What does “state” mean in a distributed / microservices architecture ?

2. Local & deterministic
* Well defined unambiguous state
* Developer’s comfort zone

3. “Service” level
* Bounded context
* Testable behaviour
* DDD comfort zone

4. “System” level
* Emergent behaviour(s)
* Is anyone comfortable here?

5. What can we do?
* Measure everything
OLJ 565 M
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Gary

6. What can we do?
* Abstractions

7. What can we do?
* Process

8. It depends
* Measure
* Abstractions
* Process

9. An approach…
Atomically consistent data
Well defined boundaries
Behaviour
Process rules