The Model Repository Service requires a Model repository in a relational database. When you create the Model Repository Service, you must provide connection information to the database.
Create the following database before you create the Model Repository Service:
Model repository
Stores metadata created by Informatica clients and application services in a relational database to enable collaboration among the clients and services. You need a Model repository to store the design-time and run-time objects created by Informatica clients and application services.