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Posted to commits@cloudstack.apache.org by "andrea-janna (via GitHub)" <gi...@apache.org> on 2026/05/29 14:18:39 UTC
[I] more realistic disk size for Ceph primary storage [cloudstack]
andrea-janna opened a new issue, #13289:
URL: https://github.com/apache/cloudstack/issues/13289
### The required feature described as a wish
On Cloudstack 4.22.1.0 I created a RBD primary storage on a RADOS pool named "cloudstack-ssd".
Ceph reports that the pool used percentage is 5.17 and the maximum available capacity is 2.6 TiB.
```
# ceph df
--- RAW STORAGE ---
CLASS SIZE AVAIL USED RAW USED %RAW USED
hdd 33 TiB 31 TiB 1.3 TiB 1.3 TiB 3.89
ssd 8.7 TiB 8.3 TiB 447 GiB 447 GiB 5.00
TOTAL 41 TiB 40 TiB 1.7 TiB 1.7 TiB 4.12
--- POOLS ---
POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL
cloudstack-ssd 4 32 169 GiB 48.15k 438 GiB 5.17 2.6 TiB
cloudstack-hdd 5 32 427 GiB 111.94k 1.2 TiB 3.96 9.7 TiB
```
But Cloudstack reports that "cloudstack-ssd" primary storage size is 42476.68 GB (about 41 TiB), which is Ceph total raw capacity.
<img width="612" height="119" alt="Image" src="https://github.com/user-attachments/assets/0d1c05db-7806-4c80-b8b4-94ea80f9f541" />
I think that the value reported by Cloudstack is misleading.
It's not possible to compute the exact pool size because the raw space is contended between different pools.
But a better option could be that for a RBD storage Cloudstack displays the pool maximum available size and the used percentage (2.6 TiB and 5.17% in my configuration) instead of the total raw Ceph size (41 TiB in my configuration).
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Re: [I] more realistic disk size for Ceph primary storage [cloudstack]
Posted by "wido (via GitHub)" <gi...@apache.org>.
wido commented on issue #13289:
URL: https://github.com/apache/cloudstack/issues/13289#issuecomment-5090715655
CloudStack gets the information from Libvirt. That's where this needs to be fixed. The Libvirt storage pool driver is reporting this information to CloudStack and that is where we act upon.
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