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

5. Configure the Cluster Volume Manager (CVM)
Configure the system multi-node package, SG-CFS-pkg, to configure and start
the CVM/CFS stack. Unlike VxVM-CVM-pkg, the SG-CFS-pkg does not restrict
heartbeat subnets to a single subnet and supports multiple subnets.
# cfscluster config -s
The following output will be displayed:
CVM is now configured[LINEBREAK]Starting CVM...[LINEBREAK]It
might take a few minutes to complete
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
or
mode: enabled: cluster active - MASTERslave: ever3b
6. 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 Appendix G of the Managing Serviceguard Fifteenth Edition user’s
guide.
7. Initializing Disks for CVM/CFS
You need 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
8. 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 cfsdg1 c4t4d0
Creating a Storage Infrastructure with CFS 113