Disaster recovery rehearsal in Continentalclusters

3. Using the cmviewconcl command, verify that the recovery group inv_rac10g_recgp is in

maintenance mode.

4. Prepare the replication environment for DR rehearsal.

Manually suspend the replication and enable write access to secondary mirror copy.

$) pairsplit –g inv_rac10g_dg -rw

For each volume group configured on the secondary mirror copy change the cluster id by running

the following command from any of the recovery cluster nodes.

#vgchange -c n –S n inv_rac10g_vg1

#vgchange -c y –S y inv_rac10g_vg1

#vgchange -c n –S n inv_rac10g_vg2

#vgchange -c y –S y inv_rac10g_vg2

Split the BC pair at recovery cluster.

#export HORCC_MRCF=1

#pairsplit –g inv_rac10g_dg

#unset HORCC_MRCF

5. Change the client access IP address on the recovery cluster. In this example the VIP addresses set

up at the recovery cluster nodes are changes for rehearsal.

Note: This is done to prevent clients from connecting to the database and making production changes during

rehearsal. For more details refer to the

Client access IP address.

On either HOUnode1 or HOUnode2, run the following command as oracle user. Then from the

the command output, identify the VIP address currently set up on nodes, HOUnode1 and

HOUnode2. For this white paper, it is assumed that on HOUnode1 the VIP address set up is

VIP_Rec1_Addr, and on HOUnode2 the VIP address set up is VIP_Rec2_Addr.

$) cluvfy comp nodecon -n all –verbose

On each recovery cluster node, select a free IP address to be used as the VIP address for

rehearsal. Assume that the VIP address identified for HOUnode1 is VIP_Reh1_Addr, and on

HOUnode2 as VIP_Reh2_Addr. For this white paper, it is assumed that on HOUnode1 the VIP

address selected for rehearsal is VIP_Reh1_Addr, and on HOUnode2 the VIP address selected is

VIP_Reh2_Addr.

On hosts HOUnode1 and HOUnode2, make necessary changes to /etc/hosts to associate the

host name with new VIP address.

On either HOUnode1 or HOUnode2, run the following command as root user.

$ export ORACLE_HOME=/opt/app/oracle/product/10.2.0/db_1

$ export PATH=$PATH:$ORACLE_HOME/bin

$) srvctl modify nodeapps -n HOUnode1 -A “VIP_Reh1_Addr”/<subnetmask>/lan0

$) srvctl modify nodeapps -n HOUnode2 -A “VIP_Reh2_Addr”/<subnetmask>/lan0

Note: For more details on how to change the public VIP, refer to

http://download.oracle.com/docs/cd/B28359_01/rac.111/b28255/votocr.htm#BGBGDHFG.

6. Start rehearsal.

$) cmrecovercl -r -g inv_rac10g_recgp

Note: Using the “cmviewcl” command, verify that the rehearsal package inv_rac10g_rhpkg was started.