Hi all, I’m working on a production deployment using OpenStack (Kolla Ansible 2023.1) and Ceph (via Ceph Ansible). Setup Overview: One control plane with shared core services. Multiple availability zones (AZs), each as a separate Nova Cell. Each AZ has its own Ceph cluster, connected via RBD mirroring for DC/DR. Architecture diagram is attached below Looking for advice on: Best practices for this architecture. Ceph RBD mirroring impact on Glance, Cinder, Nova. Suggestions for high availability and failover strategies in this design. Appreciate any guidance or references! Thanks & regards Thamanna Farhath N​ Disclaimer : The content of this email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to which they are addressed. If you have received this email in error, please notify the sender and remove the messages from your system. If you are not the named addressee, it is strictly forbidden for you to share, circulate, distribute or copy any part of this e-mail to any third party without the written consent of the sender. E-mail transmission cannot be guaranteed to be secured or error free as information could be intercepted, corrupted, lost, destroyed, arrive late, incomplete, or may contain viruses. Therefore, we do not accept liability for any errors or omissions in the contents of this message, which arise as a result of e-mail transmission. The recipient should check this e-mail and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email."