Hi, I just started working on Storm, so please forgive if my question is too trivial. :D
This doc <http://storm.apache.org/releases/1.0.2/Trident-state.html> clearly explain the intricacies needed for achieving exactly-once semantics. But then at the end it says *"The nice thing about Trident is that it internalizes all the fault-tolerance logic within the State – as a user you don't have to deal with comparing txids, storing multiple values in the database, or anything like that."* Does that mean I don't have to store txn-id in my database along with the data I am persisting ? If yes, then how does Trident make sure that same row is not updated twice when DB update happened but acknowledgement is not received ? Thanks, Rajat
