Disaster recovery rehearsal in Continentalclusters

Package configuration

This section describes the package related configuration procedures that you need to follow;

1. Disable domino mode (required only for Continentalclusters using EMC SRDF data replication).

2. Set up the file system for Continentalclusters state directory.

3. Configure the monitor package to mount the file system from the shared disk.

4. Configure the rehearsal package.

5. Change the primary package Metrocluster environment file (required only for Continentalclusters

using EMC SRDF data replication).

Device group configuration changes

To prevent failure of primary packages during rehearsal (during when replication is suspended), the

domino mode for the device groups must be disabled. This is only required for Continentalclusters

using EMC SRDF data replication. This ensures that during rehearsal, the primary packages will be

highly available at the primary cluster.

To disable domino mode for the device group sales_rac9i_dg, run the following command on

ATLnode1:

#symrdf -g sales_rac9i_dg set domino off

Set up filesystem for the Continentalclusters state directory

Set up the Continentalclusters state directory on those clusters that are set up with Continentalclusters

monitor package using a non-replicated shared disk. In this white paper the Continentalclusters state

directory is set up on a LVM VG.

To create the filesystem on Atlanta cluster, complete the followings steps on ATLnode1 (or any node in

the cluster);

1. Create the volume group vgcc with the disk that is shared to ATLnode1 and ATLnode2. Assume the

device file name for the shared disk is /dev/dsk/c8t0d1 on ATLnode1.

#mkdir /dev/vgcc

#mknod /dev/vgcc/group c 64 0xnn0000; where the nn is unique within the cluster

#pvcreate -f /dev/rdsk/c8t0d1

#vgcreate /dev/vgcc /dev/dsk/c8t0d1

2. Create a logical volume of 1000 MB in the volume group and install ’vxfs’ file system in the

logical volume as follows:

#lvcreate –L 1000 /dev/vgcc;

#newfs -F vxfs /dev/vgcc/rlvol1

3. From each node of Atlanta cluster (i.e., ATLnode1, and ATLnode2), create the Continentalclusters

shared directory /opt/cmconcl/statedir as follows:

#mkdir /opt/cmconcl/statedir