In Ceph RBD block storage, which level of QOS setting takes precedence? Pool level or image level?
07:27 26 Mar 2026

In Ceph, RBD block storage QOS can be set at both RBD pool level as well as individual RBD image level.

At the image level: rbd config image set / rbd_qos_iops_limit

At the pool level: rbd config pool set rbd_qos_iops_limit

If I have set iops limit to 1000 at pool level and at 2000 at image level, which threshold value will be honored?

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