Hi, Raghavendra, Just sharing my experience, I started working on A/A support for NetApp NFS driver, and I followed the same steps you summarized. Besides that, I think the effort is to understand/test if any of the driver features might break in the A/A environment. If anyone knows about anything else we should test, I would be happy to know too. Regards, Nahim Souza. From: U T, Raghavendra <raghavendra-uddhav.tilay@hpe.com> Sent: Monday, May 8, 2023 09:18 To: openstack-discuss@lists.openstack.org Subject: [cinder][dev] Add support in driver - Active/Active High Availability NetApp Security WARNING: This is an external email. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi, We wish to add Active/Active High Availability to: 1] HPE 3par driver - cinder/cinder/volume/drivers/hpe/hpe_3par_common.py 2] Nimble driver - cinder/cinder/volume/drivers/hpe/nimble.py Checked documentation at https://docs.openstack.org/cinder/latest/contributor/high_availability.html https://docs.openstack.org/cinder/latest/contributor/high_availability.html#... https://docs.openstack.org/cinder/latest/contributor/high_availability.html#... Summary of steps: 1] In driver code, set SUPPORTS_ACTIVE_ACTIVE = True 2] Split the method failover_host() into two methods: failover() and failover_completed() 3] In cinder.conf, specify cluster name in [DEFAULT] section cluster = <cluster_name> 4] Configure atleast two nodes in HA and perform testing Is this sufficient or anything else required ? Note: For Nimble driver, replication feature is not yet added. So can the above step 2 be skipped? Appreciate any suggestions / pointers. Regards, Raghavendra Tilay.