Depending on which data warehouse solution is chosen, we have to ensure that authorized applications and users can write to and read from the data warehouse. Proper security policies and auditing should be in place to make sure that this large scale of data is not easily accessible to everyone.
In order to implement all these access policies, we can use the operating system provided mechanisms like file access controls and use access controls. Since we're talking about geographically distributed big data systems, we have to think and design centralized authentication systems to provide a seamless experience for employees when interacting with these big data systems.
