Guidelines
- Volume types
- ceph-ec: ceph in EC 4+2 using hdd. Exposed to all projects.
- 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
By default 200 GB of quota per project for the ceph type for INFN - By default 200 GB of quota per project for the equallogicceph-unipd ec type for the Unipd projects
- Explicitly set 0 GB for all other volume types
- 5000 GB of quota per volume. If some quota is given to iscsi-infnpd, this value must be set to 1000 GBall projects
- If more disk space is needed use :
- The equallogic-unipd volume type for Unipd projects
The ceph-ec type by default for INFN projects (the ceph and iscsi-infnpd volume types can also be used, in some special cases)the ceph-ec volume type - ceph-ssd-r3 usable only for particular use cases and only for selected users
How to see quota usage
To check the cinder quota and the actual usage for a project:
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# cinder quota-usage <project-id>
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E.g.:
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language | bash |
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# cinder quota-usage b38a0dab349e42bdbb469274b20a91b4
+----------------------------+--------+----------+-------+-----------+
| Type | In_use | Reserved | Limit | Allocated |
+----------------------------+--------+----------+-------+-----------+
| backup_gigabytes | 0 | 0 | 1000 | 0 |
| backups | 0 | 0 | 10 | 0 |
| gigabytes | 120414 | 0 | 700 | 300 0 |
| gigabytes_ceph___DEFAULT__ | 850 | 0 | -1 | 100 0 |
| gigabytes_glusterceph | 239 | 0 | 500 | 0 |
| -1gigabytes_ceph-ec | 175 | 0 | 200 | 0 |
| gigabytes_iscsi-infnpd | 35equallogic-unipd | 0 | 0 | 0 | 0 |
| groups | 0 | 0 | 200 10 | 0 |
| per_volume_gigabytes | 0 | 0 | 1000 | 5000 | 0 |
| snapshots | 0 | 0 | 10 | 0 |
| snapshots___DEFAULT__ | 0 | 0 | -1 | 0 |
| snapshots_ceph | 0 | 0 | -1 | 0 |
| snapshots_glusterceph-ec | 0 | 0 | -1 | 0 |
| snapshots_iscsiequallogic-infnpdunipd | 0 | 0 | -1 | 0 |
| volumes | 20 8 | 0 | 20 | 0 |
| volumes___DEFAULT__ | 0 | 0 | -1 | 0 |
| volumes_ceph | 614 | 0 | -1 | 0 |
| volumes_gluster | 0ceph-ec | 6 | 0 | -1 | 0 |
| volumes_iscsiequallogic-infnpdunipd | 20 | 0 | -1 | 0 |
+----------------------------+--------+----------+-------+-----------+ |
How to set/change quota
Through the dashboard it is possible to only set the overall quota for a given project.
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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> |
NB: Please note that the overall quota (gigabytes) also must be updated. Its value must be the sum of the quotas of all backends.
How to expose the ceph-ssd-r3 volume type
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cinder type-access-add --volume-type ceph-ssd-r3 --project-id <projectid> |
Then set the quota
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cinder quota-update --gigabytes ,GB> --volume-type ceph-ssd-r3 <project-id> |
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