VERITAS Storage Foundation 4.1 Oracle Administrator's Guide

Chapter 2, Setting Up Databases

Prerelease 8 September 2005, 8:54am Creating a Volume Set

Creating a Volume Set

Volume Sets enable the use of the Multi-Volume Support feature with VERITAS File System

(VxFS). It is also possible to use the VERITAS Enterprise Administrator (VEA) to create and

administer volumes sets. For more information, see the VEA online help.

Note For details regarding usage of the vxvset command, see the vxvset(1M) manual page.

Note Most VxVM commands require superuser or equivalent privileges.

Usage Notes

◆ A maximum of 256 volumes may be configured in a volume set.

◆ Only VERITAS File System is supported on a volume set.

◆ The first volume in a volume set must be larger than 20MB.

◆ Raw I/O from and to a volume set is not supported.

◆ Volume sets can be used instead of volumes with the following vxsnap operations on instant

snapshots: addmir, dis, make, prepare, reattach, refresh, restore, rmmir,

split, syncpause, syncresume, syncstart, syncstop, syncwait, and

unprepare. The third-mirror break-off usage model for full-sized instant snapshots is

supported for volume sets provided that sufficient plexes exist for each volume in the volume

set. Refer to the VERITAS Volume Manager 4.1 Administrator’s Guide for more information on

instant snapshots.

◆ A full-sized snapshot of a volume set must itself be a volume set with the same number of

volumes and the same volume index numbers as the parent. The corresponding volumes in the

parent and snapshot volume sets are also subject to the same restrictions as apply between

standalone volumes and their snapshots.

▼ To create a volume set for use by VERITAS File System (VxFS), using the CLI

Use the following command:

# /opt/VRTS/bin/vxvset [-g diskgroup] -t vxfs make volset volume

Here volset is the name of the volume set, and volume is the name of the first volume in the

volume set. The -t option defines the content handler subdirectory for the application that is to be

used with the volume. This subdirectory contains utilities that an application uses to operate on the

volume set. The operation of these utilities is determined by the requirements of the application and

not by VxVM.