--- prelude: > In most of case, the disks used by ceph have different size. Use the default value 1 may block the ceph when one disk is full. Use the disk size as osd weight will more reasonally. features: - support using the disk size as the osd weight when osd_initial_weight is auto upgrade: - the os_initial_weight still has the default value 1, it will not break cluster when upgrading.