Synchronizer Question

I'm beginning a deployment of RDM, and I *think* the synchronizer can do what I want. I want some clarification on best practice. I work for a retail chain with about 100 stores. All of our stores are (more or less) cookie cutter.
- I will be using a database so that all users share a connection tree
- I plan to make a template with all the connections I need for each store.
- I want to use the Synchronizer with a CSV file to populate a group with a template instance for each store.
I guess my question is, will the Synchronizer read the CSV and create all the connections in the database? Or will it "Synchronize" every time a user launches RDM?