I read a couple of article about Kappa and Lambda Architecture.
I'm convince that Flink will simplify this one with streaming.
However i also stumble upon this blog post that has valid argument to have a system of record storage ( event sourcing ) and finally lambda architecture is appear at the solution. Basically it will write twice to Queuing system and C* for safety. System of record here is basically storing the event (delta).
Another approach is about lambda architecture for maintaining the correctness of the system.
Given that he's using Spark for the streaming processor, do we have to do the same thing with Apache Flink ?