What are differences between "Development Time SubSet" and "Full Cluster Data Set" on one machine

hello dears,
i faced a very interesting issue today, i installed couchbase-server on one machine and tried to make some Views, i ran my Views in “Development Time SubSet” there were not any result , but when i tried that in “Full Cluster Data Set” tab , there were rows.
as i remember from 4.1, first tab meant for which server you connected to it and next tab make result on cluster.
I’m appreciate if any one explain this issue.