Veritas Storage Foundation Intelligent Storage Provisioning 5.0 Solutions Guide, HP-UX 11i v3, First Edition, May 2008

40 Glossary
snapshot
A copy of the data in a volume (volume snapshot) or in a file system (file system snapshot) at
a moment in time.
storage attribute
A storage attribute allows the properties of a LUN to be defined in an arbitrary conceptual
space. You can use disk tags to create storage attributes in addition to those that are
intrinsically associated with the disk hardware, and which are automatically discovered or
assigned by VxVM. Disk tags are administered by using the vxdisk command or the
graphical user interface.
storage pool
A storage pool is defined within a disk group in VxVM for use by ISP. A storage pool is a
policy-based container for LUNs and volumes. This means that the templates, capabilities
and policies that are associated with a storage pool define how storage is organized within
the pool.
storage pool policy
A storage pool policy defines how the storage pool behaves when more storage is required,
and when you try to create volumes whose capabilities are not permitted by the current
templates.
storage tier
Storage tiers establish quality of storage service (QoSS) criteria that allow an enterprise’s
data to be organized with varying degrees of availability and performance on storage with
varying degrees of performance, accessibility and cost.
tag
A tag is a label with an optional value that can be used to identify a property of disks and
volumes in VxVM.
template
See volume template.
user template
A user template (or user-defined template) defines an arbitrary collection of capabilities,
templates and rules to which you want volumes of a certain type to conform. For example,
you might want all volumes that you create to store database tables to share the same
reliability and performance capabilities, and also that they only be allocated from a
restricted set of storage. It is useful to create user templates if you regularly create volumes
with similar capabilities.
volume
A volume in VxVM is a virtual disk, which represents an addressable range of disk blocks
used by applications such as file systems or databases.
Also see application volume.
volume snapshot
See snapshot.