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by arethuza 5637 days ago
CouchDB has a changes API that can send notifications to a client of what has changed - you can restrict this to changes you are interested in by using filter functions, which are a bit like views.

See: http://guide.couchdb.org/editions/1/en/notifications.html

[NB I can't really compare this to any other NoSQL db - I've only used CouchDB, although in the past I have built various document oriented data stored, something that I've now stopped doing!].