What is meant by Hiera?

Here is a dynamic approach to keep data separated from the Puppet Code. For minimising duplication of code, the separated data is kept by Hiera in a hierarchical model which is powerful. Here is very helpful for the declaration of a class which asks for many class parameters. A group of YAML files stores the entire data. Data is requested by Puppet via Hiera that does enquiry YAML files. YAML files are queried by Hiera in “ Fallback Style “.