I have a RDO openstack installation with Ceph as backend. I have flavor configured with normal disk + ephemeral. let take my m1.tiny flavor: 4G of disk + 4G ephemeral.
When I boot a VM, and do a fdisk: /dev/vda is 4TB: the size of the free remaining ceph cluster (or something like this) /dev/vdb is 4G, the normal size of the ephemeral disk.
I don't understand why I see the size of the ceph cluster (~4T) for /dev/vda and not the allocated size (4G).