When setting this CRUSH rule we are always locating all the primary PGs in DC1. If we have active/active OCP clusters we want to spread the primary PGs in all DCs, not locating the primary PGs in DC1 as all the applications will read from DC1 suffering performance issues.

If you want to spread the primary PGs between DCs, you have to set the following rule:

rule stretch_rule {
        id 1
        type replicated
        min_size 1
        max_size 10
        step take default
        step choose firstn 0 type datacenter
        step chooseleaf firstn 2 type host
        step emit
}

Thanks. Regards

Reported by: ddomingu

https://access.redhat.com/documentation/en-us/red_hat_openshift_data_foundation/4.11/html/configuring_openshift_data_foundation_disaster_recovery_for_openshift_workloads/metro-dr-solution#annotations:9bb3553a-f86b-414e-9df7-bbab730d611c