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Hello, there

I'm trying to create incremental backup to 2nd Ceph cluster, but all backups on those cluster are full.
Can anybody tell my why?

My steps are:
1. cinder backup-create --force 46a306ae-2454-4425-a6f7-96d7c02acc95
2. cinder backup-create --incremental --force 46a306ae-2454-4425-a6f7-96d7c02acc95
and what I see:
rbd --cluster bak -p backups du
NAME PROVISIONED USED 
volume-46a306ae-2454-4425-a6f7-96d7c02acc95.backup.7546c2ba-23f5-45d5-84f1-81690d2d9394 20480M 20480M 
volume-46a306ae-2454-4425-a6f7-96d7c02acc95.backup.86bb7e11-4036-4843-82b1-c263766892e1 20480M 20480M 
volume-46a306ae-2454-4425-a6f7-96d7c02acc95.backup.b32e60bb-511c-4be7-9c3f-9569063ad6d9 20480M 20480M 
<TOTAL> 61440M 61440M
each backup images have 20G size.

-- 
Konstantin
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