So we need to know that if we add the class and it's records, they have to stay. Otherwise we could block actions because a record was not there - for whatever reason.
This all still falls apart when you are talking about a volitale cache, IMO. What happens when a memcached node goes down? You have to plan for that.
It just does not sound like memcached is a good match for what you are trying to do.
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