https://www.simplyblock.io/glossary/what-is-couchdb/
CouchDB in Distributed and Offline Systems | simplyblock
CouchDB is a scalable, schema-less NoSQL database built for replication, offline sync, and high availability across distributed environments.
offline systemscouchdbdistributed
https://d1eu30co0ohy4w.cloudfront.net/alpicola/b-testing-for-recommender-systems
Offline A/B testing for Recommender Systems - Speaker Deck
a b testingrecommender systemsofflinespeakerdeck