I see the same for Wallaby, object_count is always 0. Zitat von Eugen Block <eblock@nde.ag>:
Hi,
I don't see an object_count > 0 for all incremental backups or the full backup. I tried both with a "full" volume (from image) as well as en empty volume, put a filesystem on it and copied tiny files onto it. This is the result:
controller02:~ # openstack volume backup list +--------------------------------------+--------------+-------------+-----------+------+ | ID | Name | Description | Status | Size | +--------------------------------------+--------------+-------------+-----------+------+ | a8a448e7-8bfd-46e3-81bf-3b1d607893e7 | inc-backup2 | None | available | 4 | | 3d11faa0-d67c-432d-afb1-ff44f6a3b4a7 | inc-backup1 | None | available | 4 | | 125c23cd-a5e8-4a7a-b59a-015d0bc5902c | full-backup1 | None | available | 4 | +--------------------------------------+--------------+-------------+-----------+------+
controller02:~ # for i in `openstack volume backup list -c ID -f value`; do openstack volume backup show $i -c id -c is_incremental -c object_count -f value; done a8a448e7-8bfd-46e3-81bf-3b1d607893e7 True
3d11faa0-d67c-432d-afb1-ff44f6a3b4a7 True
125c23cd-a5e8-4a7a-b59a-015d0bc5902c False
This is still Victoria, though, I think I have a Wallaby test installation, I'll try that as well. In which case should object_count be > 0? All my installations have ceph as storage backend.
Thanks, Eugen
Zitat von Masayuki Igawa <masayuki.igawa@gmail.com>:
Hi Satish,
Whenever I take incremental backup it shows a similar size of original volume. Technically It should be smaller. Question is does ceph support incremental backup with cinder?
IIUC, it would be expected behavior. According to the API Doc[1], "size" is "The size of the volume, in gibibytes (GiB)." So, it's not the actual size of the snapshot itself.
What about the "object_count" of "openstack volume backup show" output? The incremental's one should be zero or less than the full backup at least?
[1] https://docs.openstack.org/api-ref/block-storage/v3/?expanded=show-backup-de...
-- Masayuki Igawa
On Wed, May 17, 2023, at 03:51, Satish Patel wrote:
Folks,
I have ceph storage for my openstack and configure cinder-volume and cinder-backup service for my disaster solution. I am trying to use the cinder-backup incremental option to save storage space but somehow It doesn't work the way it should work.
Whenever I take incremental backup it shows a similar size of original volume. Technically It should be smaller. Question is does ceph support incremental backup with cinder?
I am running a Yoga release.
$ openstack volume list +--------------------------------------+------------+------------+------+-------------------------------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+------------+------------+------+-------------------------------------+ | 285a49a6-0e03-49e5-abf1-1c1efbfeb5f2 | spatel-vol | backing-up | 10 | Attached to spatel-foo on /dev/sdc | +--------------------------------------+------------+------------+------+-------------------------------------+
### Create full backup $ openstack volume backup create --name spatel-vol-backup spatel-vol --force +-------+--------------------------------------+ | Field | Value | +-------+--------------------------------------+ | id | 4351d9d3-85fa-4cd5-b21d-619b3385aefc | | name | spatel-vol-backup | +-------+--------------------------------------+
### Create incremental $ openstack volume backup create --name spatel-vol-backup-1 --incremental --force spatel-vol +-------+--------------------------------------+ | Field | Value | +-------+--------------------------------------+ | id | 294b58af-771b-4a9f-bb7b-c37a4f84d678 | | name | spatel-vol-backup-1 | +-------+--------------------------------------+
$ openstack volume backup list +--------------------------------------+---------------------+-------------+-----------+------+ | ID | Name | Description | Status | Size | +--------------------------------------+---------------------+-------------+-----------+------+ | 294b58af-771b-4a9f-bb7b-c37a4f84d678 | spatel-vol-backup-1 | None | available | 10 | | 4351d9d3-85fa-4cd5-b21d-619b3385aefc | spatel-vol-backup | None | available | 10 | +--------------------------------------+---------------------+-------------+-----------+------+ My incremental backup still shows 10G size which should be lower compared to the first backup.