This video explains how to perform parallel upgrade of Informatica - clone the existing server.

Expertise: Intermediate
User Type: Administrator
Category: Administration
Project Phase: Configure
Problem Type: Configuration

Reference:
How to Perform Parallel upgrade of Informatica - Part 2: Upgrade Informatica
https://youtu.be/uv0zouJX9kQ

Support videos for domain, Repository backup and restore steps:
Domain : https://www.youtube.com/watch?v=Ar5aDClHH5c&feature=youtu.be
Repository: https://www.youtube.com/watch?v=QVJGjfRZg5o&feature=youtu.be
KB article: https://kb.informatica.com/howto/6/Pages/6/181800.aspx