I’m trying to deploy this configuration: IMAGE_DS for “golden images” I would like to be backed up by CEPH pool using HDDs and SYSTEM_DS for VM disks by CEPH pool using SSDs.
According to CEPH documentation (https://docs.ceph.com/docs/master/rbd/rbd-snapshot/#getting-started-with-layering) it is possible to make a clone of image snapshot to different pool and surprisingly! - it is ( see screenshot ).
So the questions.
What SYSTEM_DS in opennebula using CEPH backend is used for?
Because every image - persistent and non-persistent - is being cloned into IMAGE_DS whatever I put in TM_MAD_CONF or datastore parameters.
Is it possible to force opennebula to use SYSTEM_DS for clones of image snapshots?