Extra specs enable vendors to specify extra filter criteria that the Block Storage scheduler uses when it determines which volume node should fulfill a volume provisioning request. When you use the NetApp unified driver with a clustered Data ONTAP storage system, you can leverage extra specs with OpenStack Block Storage volume types to ensure that OpenStack Block Storage volumes are created on storage back ends that have certain properties. For example, when you configure QoS, mirroring, or compression for a storage back end.
Extra specs are associated with OpenStack Block Storage volume types, so that when users request volumes of a particular volume type, the volumes are created on storage back ends that meet the list of requirements. For example, the back ends have the available space or extra specs. You can use the specs in the following table when you define OpenStack Block Storage volume types by using the cinder type-key command.
| Extra spec | Type | Description | |||||||||||||||||||||||||||||||||||||||||||||||
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netapp_raid_type |
String | Limit the candidate volume list based on one of the following raid types: raid4, raid_dp. |
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netapp_disk_type |
String | Limit the candidate volume list based on one of the following disk types: ATA, BSAS, EATA, FCAL, FSAS, LUN, MSATA, SAS, SATA, SCSI, XATA, XSAS, or SSD. |
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netapp:qos_policy_group[a] |
String | Specify the name of a QoS policy group, which defines measurable Service Level Objectives, that should be applied to the OpenStack Block Storage volume at the time of volume creation. Ensure that the QoS policy group object within Data ONTAP should be defined before an OpenStack Block Storage volume is created, and that the QoS policy group is not associated with the destination FlexVol volume. | |||||||||||||||||||||||||||||||||||||||||||||||
netapp_mirrored |
Boolean | Limit the candidate volume list to only the ones that are mirrored on the storage controller. | |||||||||||||||||||||||||||||||||||||||||||||||
netapp_unmirrored[b] |
Boolean | Limit the candidate volume list to only the ones that are not mirrored on the storage controller. | |||||||||||||||||||||||||||||||||||||||||||||||
netapp_dedup |
Boolean | Limit the candidate volume list to only the ones that have deduplication enabled on the storage controller. | |||||||||||||||||||||||||||||||||||||||||||||||
netapp_nodedup[b] |
Boolean | Limit the candidate volume list to only the ones that have deduplication disabled on the storage controller. | |||||||||||||||||||||||||||||||||||||||||||||||
netapp_compression |
Boolean | Limit the candidate volume list to only the ones that have compression enabled on the storage controller. | |||||||||||||||||||||||||||||||||||||||||||||||
netapp_nocompression[b] |
Boolean | Limit the candidate volume list to only the ones that have compression disabled on the storage controller. | |||||||||||||||||||||||||||||||||||||||||||||||
netapp_thin_provisioned |
Boolean | Limit the candidate volume list to only the ones that support thin provisioning on the storage controller. | |||||||||||||||||||||||||||||||||||||||||||||||
netapp_thick_provisioned[b] |
Boolean | Limit the candidate volume list to only the ones that support thick provisioning on the storage controller. | |||||||||||||||||||||||||||||||||||||||||||||||
[a] Please note that this extra spec has a colon ( [b] In the Juno release, these negative-assertion extra specs are formally deprecated by the NetApp unified driver. Instead of using the deprecated negative-assertion extra specs (for example, | |||||||||||||||||||||||||||||||||||||||||||||||||
