About OpenStorage disk pools
An OpenStorage disk pool represents the disk storage that is exposed to NetBackup
through the OpenStorage API.
The storage vendor determines how to expose the storage, as follows:
■ For disk appliance storage, the vendor may expose the storage as one or more
units of storage (that is, disk volumes).
■ For Nirvanix cloud storage, a child account is exposed as a single volume. If
the Nirvanix application (that is, storage pool) has more than one child account,
each is exposed as a volume.
See “About Nirvanix child accounts” on page 73.
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: available
capacity and 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.
A disk pool is the storage destination of a NetBackup storage unit.
Figure 8-1 shows a disk pool configuration in a disk appliance.
Figure 8-1
OpenStorage disk appliance disk pools
Disk appliance
DP_Gold_OpenStorage
DP_Silver_OpenStorage
See “Configuring an OpenStorage disk pool” on page 89.
About spanning volumes on OpenStorage disk pools
One of the capabilities a vendor may expose is the potential for images to span
across volumes within a disk pool. NetBackup uses that capability to use the disk
storage most effectively. NetBackup breaks up backup images into fragments and
stores a fragment or fragments if a full image does not fit into the space available.
63Planning your deployment
About OpenStorage disk pools
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