Using Serviceguard Extension for RAC, 10th Edition, April 2013

3. Configure the Cluster Volume Manager (CVM).
To configure and start the CVM stack, you need to configure the system multi-node package,
SG-CFS-pkg. The SG-CFS-pkg does not restrict heartbeat subnets to a single subnet and
supports multiple subnets.
Use the cmapplyconf command:
# cmapplyconf -P /etc/cmcluster/cfs/SG-CFS-pkg.conf
# cmrunpkg SG-CFS-pkg
When CVM starts, it selects a master node. From this node, 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
or
mode: enabled: cluster active MASTERmaster: 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 Eighteenth Edition user 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
NODE STATUS STATE
ever3a up running
ever3b up running
MULTI_NODE_PACKAGES
Creating a Storage Infrastructure with CVM 55