It is very similar process: you stop all your servers and empty those repository directories.
After that, you start your servers again and indexing process starts.
This is what we call “full re-indexing”.
Depending on the size of your project (number of assets, documents and images), this process can take some time to finish, anything between 15 min, up to hours for larger projects (if you have 100.000 or more documents/assets)