VERITAS Volume Manager 3.5 Installation Guide (August 2002)

Enabling Cluster Support in VxVM

62 VERITAS Volume Manager Installation Guide

To disable hot-relocation, you comment out the vxrelocd line in the startup ﬁle

/etc/rc2.d/S95vxvm-recover, as follows:

# nohup vxrelocd root &

Refer to the Volume Manager Administrator’s Guide for more information on hot-relocation.

Enabling Cluster Support in VxVM

Note Cluster management software such as MC/ServiceGuard must be installed on the

nodes of your cluster system.

VxVM includes an optional cluster feature that enables VxVM to be used in a cluster

environment. The cluster functionality in VxVM allows multiple hosts to simultaneously

access and manage a set of disks under VxVM control. A cluster is a set of hosts sharing a

set of disks; each host is referred to as a node in the cluster.

Enable the cluster functionality in VxVM as follows:

1. Obtain a license for the VERITAS Volume Manager cluster feature from your

Customer Support channel.

2. Install the software packages onto each system (node) to be included in the cluster as

described in “Installing VERITAS Volume Manager” on page 25.

3. Initialize VxVM using the vxinstall procedure.

4. Set up and start the VEA as described in “Starting the VEA Service” on page 60.

5. Conﬁgure shared disks as described in “Conﬁguring Shared Disks” on page 62.

Conﬁguring Shared Disks

When installing VxVM for the ﬁrst time or adding disks to an existing cluster, you must

conﬁgure new shared disks. When upgrading VxVM, you must verify that your shared

disks still exist.

Shared disks are conﬁgured from one node only. Since the VxVM software is unable to

determine whether or not a disk is shared, you must specify which disks are shared.

When conﬁguring disks, ensure that no one else is accessing shared disks from another

node. Start the cluster on the node where the conﬁguration is performed in order to

prevent disk accesses from other nodes. Quorum control reserves the disks for the single

node.