Using Serviceguard Extension for RAC, 7th Edition, September 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 Starting CVM...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

mode: enabled: cluster active - MASTERslave: ever3b

6. Converting Disks from LVM to CVM

You can 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.

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

9. Create the Disk Group Multi-Node package. Use the following command to add the disk

group to the cluster:

# cfsdgadm add cfsdg1 all=sw

The following output will be displayed:

Package name “SG-CFS-DG-1” was generated to control the resource

shared disk group “cfsdg1” is associated with the cluster.

10. Activate the Disk Group

# cfsdgadm activate cfsdg1

11. Creating Volumes and Adding a Cluster Filesystem

# vxassist -g cfsdg1 make vol1 10240m

#vxassist -g cfsdg1 make vol2 10240m

54 Serviceguard Configuration for Oracle 10g RAC