> If local by design, that wouldn't exactly cover the use case of "Redis in front of an army of $other_language workers", correct? And I guess it's accepted as costing slightly more cache misses, but with the benefit of more decentralization / node independence / resiliency, right?
Yes and yes.
Erlang/Elixir don't strive to make distributed caches. I wrote apps that have been scaled to 5 separate servers and each server has their own local cache (running inside the Erlang BEAM VM). Takes a little more time to warm the caches up on restarts but it has never been an issue so far.
The ETS tables ownership is trivial to hand out to another process if the owner dies (look for the "heir" option in ETS docs) but libraries like Cachex (linked at the bottom) and Ane (linked in my previous comment) wrap the ownership worries away from you.
What's left for you is just an uber-performant cache.
Do take a look at Cachex. It's hassle-free and just works.
