looking for documentation for HDP to CDP-dc (on prim)
Is this what you are looking for? HDP to CDP Upgrade Overview
i am going through link. but Is there any demo videos and more specific migration documents.
my requirement is:
HDP 3.1.x to CDP7.1.x
I'm not an expert in the subject but I did some looking around for you and found the following, non-exhaustive list.
Check out the Knowledge Hub on MyCloudera which includes links to webinars, CDP trainings, the CDP Upgrade Advisor and Professional Services. For non-customers
There is a blog article that may be of interest and has additional helpful links. There are also Cloudera's on-demand events for CDP which includes one titled Ask the Experts: The Path from HDP to CDP.