That's right, radosgw doesn't do accounting per storage class. All you
have to go on is the rados-level pool stats for those storage classes.

On Mon, Sep 7, 2020 at 7:05 AM Tobias Urdin <tobias.ur...@binero.com> wrote:
>
> Hello,
>
> Anybody have any feedback or ways they have resolved this issue?
>
> Best regards
> ________________________________
> From: Tobias Urdin <tobias.ur...@binero.com>
> Sent: Wednesday, August 26, 2020 3:01:49 PM
> To: ceph-users@ceph.io
> Subject: [ceph-users] Storage class usage stats
>
> Hello,
>
> I've been trying to understand if there is any way to get usage information 
> based on storage classes for buckets.
>
> Since there is no information available from the "radosgw-admin bucket stats" 
> commands nor any other endpoint I
> tried to browse the source code but couldn't find any references where the 
> storage class would be exposed in such a way.
>
> It also seems that RadosGW today is not saving any counters on amount of 
> objects stored in storage classes when it's
> collecting usage stats, which means there is no such metadata saved for a 
> bucket.
>
>
> I was hoping it was atleast saved but not exposed because then it would have 
> been a easier fix than adding support to count number of objects in storage 
> classes based on operations which would involve a lot of places and mean 
> writing to the bucket metadata on each op :(
>
>
> Is my assumptions correct that there is no way to retrieve such information, 
> meaning there is no way to measure such usage?
>
> If the answer is yes, I assume the only way to get something that could be 
> measured would be to instead have multiple placement
> targets since that is exposed from in bucket info. The bad things would be 
> though that you lose a lot of functionality related to lifecycle
> and moving a single object to another storage class.
>
> Best regards
> Tobias
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