Guidelines
- By default 200 GB of quota per project for the ceph-ec type for all projects
- Explicitly set 0 GB for all other volume types
- If more disk space is needed use the ceph-ec volume type
- Other volume types available:
- ceph: ceph in replica 3 using hdd. This is exposed to all projects, but it should be used only for old/existing volumes (in general no new volumes should be created using this volume type)
- ceph-ssd-r3: ceph in replica 3 using ssd. This is exposed only to some projects
How to see quota usage
To check the cinder quota and the actual usage for a project:
# cinder quota-usage <project-id>
E.g.:
# cinder quota-usage b38a0dab349e42bdbb469274b20a91b4 +----------------------------+--------+----------+-------+-----------+ | Type | In_use | Reserved | Limit | Allocated | +----------------------------+--------+----------+-------+-----------+ | backup_gigabytes | 0 | 0 | 1000 | 0 | | backups | 0 | 0 | 10 | 0 | | gigabytes | 414 | 0 | 700 | 0 | | gigabytes___DEFAULT__ | 0 | 0 | -1 | 0 | | gigabytes_ceph | 239 | 0 | 500 | 0 | | gigabytes_ceph-ec | 175 | 0 | 200 | 0 | | gigabytes_equallogic-unipd | 0 | 0 | 0 | 0 | | groups | 0 | 0 | 10 | 0 | | per_volume_gigabytes | 0 | 0 | 5000 | 0 | | snapshots | 0 | 0 | 10 | 0 | | snapshots___DEFAULT__ | 0 | 0 | -1 | 0 | | snapshots_ceph | 0 | 0 | -1 | 0 | | snapshots_ceph-ec | 0 | 0 | -1 | 0 | | snapshots_equallogic-unipd | 0 | 0 | -1 | 0 | | volumes | 20 | 0 | 20 | 0 | | volumes___DEFAULT__ | 0 | 0 | -1 | 0 | | volumes_ceph | 14 | 0 | -1 | 0 | | volumes_ceph-ec | 6 | 0 | -1 | 0 | | volumes_equallogic-unipd | 0 | 0 | -1 | 0 | +----------------------------+--------+----------+-------+-----------+
How to set/change quota
Through the dashboard it is possible to only set the overall quota for a given project.
To set the quota for the different volume types you have to use the command line.
E.g. to set
- 400 GB of overall quota
- 200 GB limit for ceph volume type
- 0 GB limit for the iscsi-infnpd backend
- 0 GB for the ceph-ec backend
- 200 GB for the equallogic-unipd volume type
- 5000 GB limit for volume:
cinder quota-update --gigabytes 400 <project-id> cinder quota-update --gigabytes 200 --volume-type ceph <project-id> cinder quota-update --gigabytes 0 --volume-type ceph-ec <project-id> cinder quota-update --gigabytes 0 --volume-type iscsi-infnpd <project-id> cinder quota-update --gigabytes 200 --volume-type equallogic-unipd <project-id> cinder quota-update --per-volume-gigabytes 5000 <project-id>
How to expose the ceph-ssd-r3 volume type
cinder type-access-add --volume-type ceph-ssd-r3 --project-id <projectid>
Then set the quota
cinder quota-update --gigabytes ,GB> --volume-type ceph-ssd-r3 <project-id>