Re: rbd du USED greater than PROVISIONED

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> On Aug 14, 2024, at 10:45 AM, Murilo Morais <murilo@xxxxxxxxxxxxxx> wrote:
> 
> Good morning everyone!
> 
> I am confused about the listing of the total amount used on a volume.
> It says that more than the amount provisioned is being used.

The command shows 710GB of changes since the snapshot was taken, added to the 404GB currently used by the parent. The snapshot by nature retains data that has been changed or deleted in the parent.

> The image
> contains a snapshot. Below is the output of the "rbd du" command:
> 
> user@abc2:~# rbd info
> osr1_volume_ssd/volume-6e5f90ac-78e9-465e-8705-a4d476ebc019
> rbd image 'volume-6e5f90ac-78e9-465e-8705-a4d476ebc019':
>        size 1000 GiB in 256000 objects
>        order 22 (4 MiB objects)
>        snapshot_count: 1
>        id: 3ec2fef4cd0ad8
>        block_name_prefix: rbd_data.3ec2fef4cd0ad8
>        format: 2
>        features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
>        op_features:
>        flags:
>        create_timestamp: Fri Jan  5 22:48:45 2024
>        access_timestamp: Wed Aug 14 10:46:06 2024
>        modify_timestamp: Wed Aug 14 10:47:02 2024
> user@abc2:~# rbd du osr1_volume_ssd/volume-6e5f90ac-78e9-465e-8705-a4d476ebc019
> NAME
>                    PROVISIONED  USED
> volume-6e5f90ac-78e9-465e-8705-a4d476ebc019@snapshot-23af41b0-ca7b-45df-991f-ffbe95512dbe
>    1000 GiB  710 GiB
> volume-6e5f90ac-78e9-465e-8705-a4d476ebc019
>                       1000 GiB  404 GiB
> <TOTAL>
>                       1000 GiB  1.1 TiB
> 
> 
> In this case, is that really the case or is it some kind of BUG?
> 
> For the record, we are still on version 17.2.3.
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