How to deal with losses in the Actor model?

Question

API

Hello, I stumbled upon the Actor model and I like it very much, I want to apply it but did not find the answer to a couple of questions.
Since everything works for us in the cache (memory) and is periodically clogged into the database, how do they deal with a cache drop?
after all, if the cache falls, the entire state will be lost in the last hour? If important rollback transactions took place there, how can we protect ourselves from losses?

Answer 1

google saga pattern.
in general, actors are given a strategy of behavior in case of failures.