> There are numerous ways (impl options) for resending messages. Using a 
> channel is only one. 
>
 

Other than persistent channel what are the options? I actually believe it is 
important to note in the documentation that messages in mailbox are not 
preserved by a processor, it was not obvious to me until I ran a couple of 
tests. 


Actually can you advise me to a design decision? Suppose I have an actor A that 
receives (from outside) a lot of messages per sec. It transforms them and sends 
to actor B that saves them to a database. The goal is to make sure that no 
information is lost in the case of a crash and no message is sent twice. In 
addition to it the journal must not grow uncontrollably. How would you 
implement this? Two processors and a persistent channel in between, snapshots 
and deleteMessages to control journal growth?


  

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