Using Serviceguard Extension for RAC, 6th Edition, April 2008

When CVM starts up, it selects a master node, which is the node from which you

must issue the disk group configuration commands. To determine the master node,

issue the following command from each node in the cluster:

# vxdctl -c mode

The following output will be displayed:

mode: enabled: cluster active - SLAVEmaster: ever3b

mode: enabled: cluster active - MASTERslave: ever3b

• Converting Disks from LVM to CVM

Use the vxvmconvert utility to convert LVM volume groups into CVM disk

groups. Before you can do this, the volume group must be deactivated, which

means that any package that uses the volume group must be halted. This

procedure is described in the Managing Serviceguard Fifteenth Edition user’s

guide Appendix G.

• Initializing Disks for CVM

It is necessary to initialize the physical disks that will be employed in CVM

disk groups. If a physical disk has been previously used with LVM, you should

use the pvremove command to delete the LVM header data from all the disks

in the volume group (this is not necessary if you have not previously used

the disk with LVM).

To initialize a disk for CVM, log on to the master node, then use the

vxdiskadm program to initialize multiple disks, or use the vxdisksetup

command to initialize one disk at a time, as in the following example:

# /etc/vx/bin/vxdisksetup -i c4t4d0

• Create the Disk Group for RAC

Use the vxdg command to create disk groups. Use the -s option to specify

shared mode, as in the following example:

# vxdg -s init ops_dg c4t4d0

4. Creating Volumes and Adding a Cluster Filesystem

# vxassist -g ops_dg make vol1 10240m

#vxassist -g ops_dg make vol2 10240m

# vxassist -g ops_dg make vol3 300m

5. View the Configuration

# cmviewcl

CLUSTER STATUS

ever3_cluster up

Creating a Storage Infrastructure with CVM 75