VERITAS Storage Foundation 4.1 Intelligent Storage Provisioning Administrator's Guide

Chapter 1, Understanding ISP

Examples of Using ISP from the Command Line

Having created the application volume, stmrvol, you can use the following command to prepare

it for use with volume snapshots:

# vxvoladm -g mydg -p mypool add log stmrvol nlog=2 logtype=dco

This command associates a data change object (DCO) and DCO volume with the volume. The

attribute nlog is used to specify that the DCO volume has the same redundancy as the original

volume. Alternatively, you can use the vxsnap prepare command to set up the volume for

snapshots:

# vxsnap -g mydg prepare stmrvol ndcomirs=2

For more information, see “Creating Application Volumes” on page 45 and “Creating Instant

Snapshots” on page 81.

Resizing an Application Volume

If the application volume, stmrvol, that you have just created is not large enough for your needs,

you can increase its size using this command:

# vxvoladm -g mydg -p mypool growto stmrvol 4g

Any file system or other application storage layout that you have created on the volume can be

resized after you have grown the volume.

For more information, see “Resizing Volumes Online” on page 57.

Creating a Clone Storage Pool

Assuming that you also want to create full-sized snapshots of application volumes in mypool that

can be moved into different disk groups (potentially for offhost processing), the following

command creates a clone storage pool, myclpool, in the same disk group as mypool:

# vxpool -g mydg create myclpool dm=mydg09,mydg10,mydg11,mydg12 \

autogrow=pool pooldefinition=mirrored_volumes

This pool supports the creation of mirrored volumes. It also has a non-default autogrow policy

that prevents it aggregating disks from the disk group outside the pool.

For more information, see “Preparing Storage Pools for Full-Sized Instant Snapshots” on page 75.