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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
From there we began thinking about the API and how to interact with Lua we needed a cache layer and having used https://github.com/thibaultcha/lua-resty-mlcache in the past it was again a no brainer, it provides a really nice approach for caching data in various different levels inside the Nginx processes.
For http we actually had to use another server block, I didn't like this but as the current stream Lua module doesn't have access_by_lua_* https://github.com/openresty/stream-lua-nginx-module#todo we cant read the host of a normal TCP request (not easily)