S some-admins Active Member Proxmox Subscriber Nov 14, 2019 36 2 28 36 Nov 18, 2019 #1 Hello, we wonder which of the following two setups might be the better choice for using Proxmox VE with Ceph: usual: RBD less usual: qcow2 on CephFS The second setup was mentioned in Thread. What pros and cons do you come up with? Cedric
Hello, we wonder which of the following two setups might be the better choice for using Proxmox VE with Ceph: usual: RBD less usual: qcow2 on CephFS The second setup was mentioned in Thread. What pros and cons do you come up with? Cedric
tom Proxmox Staff Member Staff member Aug 29, 2006 15,945 1,242 273 Nov 18, 2019 #2 RBD. qcow2 on CephFS does not make sense for me.
Alwin Proxmox Retired Staff Retired Staff Aug 1, 2017 4,617 492 88 Nov 18, 2019 #3 To elaborate on Tom's answer. Qcow2 is a copy-on-write (COW) file, that will create double writes on CephFS. This is counter productive for performance. And is a redundant layer, as RBD is already suited for VM/CT image storage.
To elaborate on Tom's answer. Qcow2 is a copy-on-write (COW) file, that will create double writes on CephFS. This is counter productive for performance. And is a redundant layer, as RBD is already suited for VM/CT image storage.
