When to use DbManager and when to use PhpManager?

Question

Yii

Previously, I created it on PhpManager and wrote all the roles to a file, as well as all the assignments (Assign) of the role to the user. To what extent is this correct? As I understand it, if there are 1000+ users, then all these users will be in the files. Or even with large volumes of users, the size of such a file is not significant for hosting, for example, 5 GB?
Did it out of the urge 'fewer database queries' === 'good.' How do you go about your projects?

Answer 1

If there are not many users and the RBAC hierarchy is more or less static, the files. Otherwise base.