Look below the raw section at the pools report. Add up the pools on each device class, assuming that you don’t have pools overlapping device classes. STORED is user data, before replication. This may be more clear with `ceph df detail` Note that CephFS or RGW data pools with very small files or objects may show more USED vs STORED than expected due to padding, which will be improved with Tentacle (at least for new pools). > On Jul 24, 2025, at 7:49 AM, Szabo, Istvan (Agoda) <Istvan.Szabo@xxxxxxxxx> wrote: > > Hi, > > Somehow this output always made me confused. Can you confirm my calculation is good here? > > I have this output: > > --- RAW STORAGE --- > CLASS SIZE AVAIL USED RAW USED %RAW USED > nvme 89 TiB 82 TiB 6.6 TiB 6.6 TiB 7.43 > rbd 31 TiB 16 TiB 16 TiB 16 TiB 49.52 > ssd 2.3 PiB 1.0 PiB 1.2 PiB 1.2 PiB 54.14 > TOTAL 2.4 PiB 1.1 PiB 1.2 PiB 1.2 PiB 52.36 > > SSD: ec 4:2 > rbd: repl 3 > > I want to know the stored data, which means the user side data. In ceph in EC 4:2 a 100MB object is stored on 150MB. > > In case of ssd, I want to know the used 1.2PiB means how much real user data? > For me 1.2PiB used SSD means ~903TB user data on ec 4:2. > > In case of rbd, ~6TB. > > Am I correct? > > Ty > > ________________________________ > This message is confidential and is for the sole use of the intended recipient(s). It may also be privileged or otherwise protected by copyright or other legal rules. If you have received it by mistake please let us know by reply email and delete it from your system. It is prohibited to copy this message or disclose its content to anyone. Any confidentiality or privilege is not waived or lost by any mistaken delivery or unauthorized disclosure of the message. All messages sent to and from Agoda may be monitored to ensure compliance with company policies, to protect the company's interests and to remove potential malware. Electronic messages may be intercepted, amended, lost or deleted, or contain viruses. > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
 |