I want to know which documents the set contains with “full_set=false” in a query of development views.
Does it contain all local documents in the queried node, or only a random subset?
If we have an interface to query all local documents in a given node, we can easily write customized map/reduce approaches without unnecessary network communications.
In development mode, the “full_set=false” will, as you say, take a subset of the document on the node where the query is executed. This to allow you to test the validity of the map/reduce very quickly.