The vscan stats will always be there; no need to start and stop with Harvest. I haven't created a template for vscan or fpolicy stats for cDOT yet; I don't have vscan in my lab and the time to get a vscan server up and then code the template + dashboard never made it to the top of my to-do list. But, if you check the instructions in the Harvest admin guide (chapter 9) you can probably pull something together. I also had a session at NetApp Insight #62051 where I gave an example of adding some counters. But, maybe someone else has already done this work and can share?!?
Cheers, Chris Madden
Solution Architect - 3rd Platform - Systems Engineering NetApp EMEA (and author of Harvest)