About OpenStorage disk pools for backups
An OpenStorage disk pool represents the disk storage that is exposed to NetBackup through the OpenStorage API. A disk pool is the storage destination of a NetBackup storage unit.
For disk appliance storage for backups, the vendor may expose the storage as one or more units of storage (that is, disk volumes). The vendor also may expose the volume properties that are related to replication.
A disk pool can represent one or more volumes. If a disk pool represents more than one volume, NetBackup selects a volume for a backup based on the available capacity and the predicted size of the backup. NetBackup tries to write backup data to a single volume. If necessary, backup images span volumes in a disk pool unless the storage implementation does not support volume spanning. Backup images do not span across multiple disk pools.
See About spanning volumes in OpenStorage disk pools.
How many disk pools you configure depends on your storage requirements. It also depends on whether or not you use optimized duplication or replication, as follows:
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Optimized duplication within the same NetBackup domain |
Optimized duplication in the same domain requires the following disk pools:
See About OpenStorage optimized duplication within the same domain. |
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Auto Image Replication to a different NetBackup domain |
Auto Image Replication disk pools can be either replication source or replication target. The replication properties denote the purpose of the disk pool: source or target. Your storage administrator configures the replication topology of the volumes in the storage devices, and you create the disk pools to match that topology. The disk pools inherit the replication properties from the volumes that you add to them. See About the replication topology for Auto Image Replication. Auto Image Replication requires the following disk pools:
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Figure: OpenStorage disk appliance disk pools shows a disk pool configuration in a disk appliance.
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