Comment by c9lgPZqHNGdC1V1

OpenStack doesn't really just use 'a' storage backend. You can configure a different backend depending on the service, i.e. point Manila to some proprietary Hitachi technology, point Glance to Ceph or Cinder to any of these https://docs.openstack.org/cinder/2024.1/drivers.html. Not sure what KaiserPro is going on about, as Ceph is very well supported as a storage backend for pretty much all OpenStack services. Cinder is mostly used for Volume and Snapshot management, interfacing between the front-end/API of OpenStack and whatever backend is set for Cinder, which is hosting the actual volumes and snapshots.