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

64 Creating application volumes
Creating volumes
Creating volumes
To create a volume with a specified length, specify the make keyword to
vxassist as shown here:
# vxassist [ options ] make volume length \
[ storage_specification ] [ attribute = value ...]
It is possible to specify a combination of capabilities, templates and rules to this
command. Recall that:
■ A rule specifies a criterion for choosing and allocating storage.
■ A template is a meaningful collection of rules that define a capability.
■ A capability is a high-level description of what a volume can do.
The properties of the volume that is created are further determined by any
parameters and other attributes that you specify. Rules, capabilities and
templates may be combined as follows:
■ If you specify rules along with capabilities, ISP creates volumes that comply
to the rules that are defined in the capabilities, and also to those rules that
you specify as arguments to
vxassist.
■ If you specify rules along with templates, ISP creates volumes that comply
to the rules in the templates, and also to those rules that are specified as
arguments to
vxassist.
■ If you specify capabilities along with templates, ISP selects the appropriate
templates from those specified that conform to the desired capabilities.
■ If you specify rules, capabilities and templates, ISP selects the appropriate
templates from those specified that conform to the desired capabilities, and
that adhere to the specified rules in addition to the rules in those templates.
See “Using capabilities, templates and rules” on page 137.
You can create volumes by specifying user templates that you have set up with
the required redundancy, fault tolerance, or performance capabilities for the
applications that you run at your site.
See “Creating and modifying user templates” on page 131.
Finally, in release 5.0 of VxVM, it is possible to use the
vxassist command to
create ISP volumes. If you are experienced in using specification attributes with
vxassist to create volumes, or you have a number of legacy scripts that call
vxassist, you may find it preferable to create ISP volumes in this way.
See “Creating volumes by using vxassist specification attributes” on page 65.