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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
  • projects
• 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:

...

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

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>

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