qorb could incorporate "feedback about backend health" from calllers

[smklein]

The is_healthy check from the connector is a bit binary - it either returns a result or it doesn't. By incorporating a more dynamic feedback mechanisim ('please rate this connection on a 1-5 star scale') we could give better heuristics for qorb's internal scoring system of backend preferences.

This could be extended to a connector which, for example, tracks the number of 500 errors returned from HTTP clients, tracks latencies of requests, etc.

[hawkw]

I imagine that this could be done by having Qorb call a method on the connection when it's returned to the pool that asks it "hey, what happened to you while you were claimed?"

Although, it could certainly work differently, that's just the first thing I thought of.