Feature Request

Is your feature request related to a problem? Please describe:

It would be great if we can use replica read in backup, so that it is possible to physically isolate backup traffic from mission-critical traffic (with some placement rules).

Describe the feature you'd like:

replica read in backup

Describe alternatives you've considered:

Better priority-base scheduling

Teachability, Documentation, Adoption, Migration Strategy:

Users who value performance very much may find this feature useful.