I have an app running in two datacenters backed by Eventstore.
App traffic is routed to only one DC at time.
However in case of outage of active DC1 I want to be able to route traffic to second DC.
And I really need consistency here (it’s a financial app). Even if I will be unavailable for some period of time.
I see two ways of setup:
Create Eventstore cluster over WAN. Not sure how it will behave though.
Configure JVM driver somehow so that it will write to both clusters reliably.
What would you recommend?