Hi everyone, Since I have test cloudstack 4.4.2 + kvm + rbd, deploy an instance is so fast apart from the first deployment because copy template from secondary storage (NFS) to primary storage (RBD). That is no problem. However, when I do some volume operation, such as create snapshot, create template, template deploy ect, it also take some time to finish because copy data between primary storage and secondary storage. So I think that if we support the same rbd as secondary storage, and use ceph COW feature, it may reduce the time and just some seconds. (OpenStack can make glance and cinder as the same rbd)
Best Regards, Star Guo
