Building Disaster Recovery Serviceguard Solutions Using Continentalclusters A.08.00
1. Configure either Continuous Access P9000 and XP, or Continuous Access EVA for data
replication between disk arrays associated with primary and recovery clusters.
2. Configure the database storage using one of the following software:
• Shared Logical Volume Manager (SLVM)
• Cluster Volume Manager (CVM)
• Cluster File Systems (CFS)
You must configure the SLVM volume groups or CVM disk groups on the disk arrays to store
the Oracle database. Configure the volume groups or disk groups on both primary and
recovery clusters. Ensure that the volume groups names or disk group names on both the
clusters are identical. You must also setup data replication between the disk arrays associated
with primary and recovery clusters.
Only the volume groups or disk groups configured to store the database must be configured
for replication across primary and recovery clusters. In an environment running with Oracle
Clusterware, you must configure the storage used by Oracle Clusterware to reside on disks
that are not replicated.
If you use CVM or CFS in your environment for storage infrastructure, you must complete the
following steps at both, primary and recovery clusters.
a. Ensure that the primary and recovery clusters are running.
b. Configure and start the CFS or CVM multi-node package using the command cfscluster
config -s. When CVM starts, it automatically selects the master node. This master
node is the node from which you must run the disk group configuration commands. To
determine the master node, run the following command from any node in the cluster.
# vxdctl -c mode
c. Create disk groups and mount points. For more information on creating disk groups and
mount points, see Using Serviceguard Extension for RAC user's guide.
NOTE: When you use CVM disk groups, Continentalclusters does not support configuring
the CVM disk groups in the RAC instance package files using the CVM_ACTIVATION_CMD
and CVM_DISK_GROUP variables. The instance packages must be configured to have a
dependency with the required CVM disk group multi-node package.
d. Run the following commands of the CFS scripts to add and configure the disk groups and
file system mount points multi-node packages (MNP) to the clusters. These multi-node
packages manipulate the disk group, and mount-point activities in the cluster.
• # cfsdgadm add <disk group name> all=sw
For example:
# cfsdgadm add racdgl all=sw
• # cfsmntadm add <disk group name> <volume name> <mount point>
all=rw
For example:
# cfsmntadm add racdgl vol4 /cfs/mntl all=rw
e. Set the AUTO_RUN flag to NO with the following commands:
• # cfsdgadm set_autorun <disk group name> NO
• # cfsmntadm set_autorun < mount point name> NO
f. Activate the disk group MNP:
# cfsdgadm activate <diskgroup>
g. Start the mount point MNP:
# cfsmount <mount point>
Support for Oracle RAC instances in a Continentalclusters environment 127