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

71Creating application volumes

Creating volumes with associated tags

Volume tags are used to implement the Dynamical Storage Tiering (DST) feature

of the Storage Foundation software. For more information about this feature,

see the Veritas File System Administrator’s Guide.

To create a volume with an associated tag and optional tag value, specify the

tag

attribute as shown in this example:

# vxassist -g dbdg -P dgpool make products 1g \

user_template=DBTable tag=db_table=Products

This creates a volume with a tag named db_table, which has the value

Products.

Creating multiple volumes with the same prefix

To create multiple volumes with the same name prefix, specify a numeric

argument to the nvol parameter, as shown in this example:

# vxassist -g mydg -P mypool make mirvol 15g \

layout=mirror nmir=2 nvol=3

This creates three mirrored volumes named mirvol1, mirvol2 and mirvol3.

If volumes with the same name prefix and numeric suffix already exist, the

numbering of the new volumes continues from the highest number found plus 1.

For example, if there are existing volumes named mirvol1 and mirvol2, the

new volumes are named mirvol3, mirvol4 and mirvol5.

Creating multiple volumes as a volume group

If you choose to create volumes individually, allocation may eventually fail

when the available storage is exhausted. The -M option to the

vxassist

command allows you to create several volumes at the same time while making

the most efficient use of the available storage resources. ISP automatically

chooses the best way to allocate storage to the volumes. A set of multiple

volumes that are created by this method is referred to as a volume group.

For convenience, it is easiest to define one or more volume groups in a definition

file, and have

vxassist read this file to create the volumes as shown here:

# vxassist -M make <

filename

See “Volume group definition syntax” on page 197.

A sample definition might contain the following volumegroup entry:

volumegroup {

diskgroup "mydg"

rules {

separateby "Enclosure"

exclude "Enclosure"="ENC1"