Recommendation Engines with Redis and Ruby

This talk will be a case study discussing the object-oriented considerations in designing a scalable service with Ruby, how the Redis NoSQL database was a good fit for the project, and some of the painful lessons that I learned along the way so that you don’t have to repeat them.

A couple of years ago, a client asked me to build a recommendation engine for them. Coming into this with a minimal knowledge of statistical math, I ultimately built a relatively simple recommendation engine in Ruby. The design made heavy use of Redis Sets, Lists, and Hashes in order to greatly reduce the number of SQL queries to provide recommendations.

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