High availability refers to the uninterrupted availability of computer system resources. When you configure Dynamic Data Masking, you might configure high availability for the Dynamic Data Masking Server, high availability for the database that the Dynamic Data Masking Server connects to, or both.
Informatica recommends that you use standard vendor software to implement high availability. However, if you do not have high availability configured for your database, you can configure Dynamic Data Masking high availability. To send requests to a secondary database if the primary database is unavailable, configure high availability for the database. To send requests through a secondary Dynamic Data Masking Server if the primary Dynamic Data Masking Server is unavailable, configure high availability for the Dynamic Data Masking Server.