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@LFChavier: also check out OSRM and Graphhopper for routing appliances.

Love OSM!

I'm working on a 'web scale' ( sorry for the Web3.0 jargon ) database to serve Geographic data ( OSM is among the data sets ). Primary functions will be 1) kNN lookups e.g. geocoding, 2) Point in Poly e.g. geofence and 3) bulk polygon storage e.g. OSM structures / ways.

a) Can you recommend a back-end? b) what does OSM.org use to serve data currently?

I wish...unfortunately caching kNN for super-local ( think kNN on a block or building scale ) data will be an issue.

Loading lazily from S3 would also be an issue just due to response times.

Thanks for the response, I'll check out the Servers wiki.

I've historically found issues scaling Postgres a) especially sharding Relational Databases across the globe b) with that much data, serving soft-realtime geospatial queries e.g. kNN, PostGIS crawls to a halt.

So far I've checked out GeoMesa as a drop-in, but I also love what I've seen from the mapzen folks re. the Pelias geocoding project.

Let me know if you have any further thoughts!