Very cool, and awesome on opensourcing the agentredrabbit code!

We had a somewhat simpler but related "tons of data coming in via RESTful services and don't want to flood directly to the db with massive parallel connections" issue and solved it with Redis likewise. Since we used postgres as the backend, we (http://www.ivc.com) actually sponsored a project create a Redis FDW:

https://github.com/pg-redis-fdw/redis_fdw

so we could batch up 1,000s of inserts into a single database insert, thus reducing IO to disk.