Github user LosD commented on the issue: https://github.com/apache/metamodel/pull/120 Hmmmm, good point. The thing is that if it is in a cluster, it's hard to get the docker image on the same instance (or even rack) as all the DBs it provides access to when there's many of them, and that means that for chatty apps the indirection of MM can become quite expensive. OTOH, chatty apps are often a symptom of bad app or DB design (though there is of course cases where it is unavoidable).
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