Integrated Storage Data Store Disks
Disks are partitions of an integrated storage data store that can be allocated to specific virtual servers. OnApp Storage disks are managed through the Control Panel > Storage menu. Disks for individual virtual servers are managed through the Control Panel > Cloud > Virtual Servers menu.
- When you exceed the NBD device path limit, you will see the following message in the UI failure log when starting a virtual server: No free devices available for the operation.
- Note that the advanced disk sector format is not supported for Integrated Storage disks. Ensure that your disk drives support the 512-byte sector alignment before installing and using them with Integrated Storage.
- You cannot decrease the size of Integrated Storage data store disks.
- When you exceed the NBD device path limit, you will see the following message in the UI failure log when starting a virtual server: No free devices available for the operation.
During the backup process, we take a snapshot of the virtual disk to be backed up. Before OnApp 6.8, the snapshot occupied 10% of the virtual disk size in the data store. To make a backup, you should have had a free space of at least 10% of the virtual disk size at nodes where the virtual disk was allocated. Starting with OnApp 6.8, you can configure the size of a snapshot proportionally to the size of a virtual disk.
To configure the snapshot size per cloud basis, open the /onapp/interface/config/info_hub.yml file and change the following parameters:
- snapshot_percentage_small_vdisk - the size of the vDisk is up to 10 GB; the default snapshot value is 100%
- snapshot_percentage_medium_vdisk - the size of the vDisk is from 11 to 100 GB; the default snapshot value is 15%
- snapshot_percentage_large_vdisk - the size of the vDisk is 101 GB and up; the default snapshot value is 5%
Also, you can change snapshot reservation on parent vDisk via the CLI tool from any compute resource:
onappstore snapreserve uuid=<VDISK UUID> reserve=<PERCENTAGE VALUE, e.g '20'>
CODE
The percentage value must be a multiple of 5 between 5 and 100.