Using Serviceguard Extension for RAC, 7th Edition, September 2008

Script_Parameters:
ITEM STATUS NODE_NAME NAME
Resource up manx /resource/random
Subnet up manx 192.8.15.0
Resource up burmese /resource/random
Subnet up burmese 192.8.15.0
Resource up tabby /resource/random
Subnet up tabby 192.8.15.0
Resource up persian /resource/random
Subnet up persian 192.8.15.0
Node_Switching_Parameters:
NODE_TYPE STATUS SWITCHING NAME
Primary up enabled manx
Alternate up enabled burmese
Alternate up enabled tabby
Alternate up enabled persian
Online Reconfiguration
The online reconfiguration feature provides a method to make configuration changes online to
a Serviceguard Extension for RAC (SGeRAC) cluster. Specifically, this provides the ability to
add and/or delete nodes from a running SGeRAC Cluster, and to reconfigure SLVM Volume
Group (VG) while it is being accessed by only one node.
Online Node Addition and Deletion
Online node addition enables the addition or deletion of nodes in a SGeRAC cluster to or from
another running cluster.Node(s) can be added and/or deleted by changing the cluster
configuration. This is done by editing the cluster specification file and re-applying the
configuration to the already running cluster. For deleting online node(s), the node(s) needs to
be halted before deleting them from the cluster.
Use the following steps for adding a node using online node reconfiguration:
1. Export the mapfile for the volume groups that needs to be visible in the new node ( vgexport
-s -m mapfile -p <sharedvg>).
2. Copy the mapfile to the new node.
3. Import the volume groups into the new node. (vgimport -s -m mapfile <sharedvg>).
4. Add node to the cluster online- edit the cluster configuration file to add the node details
and run cmapplyconf.
5. Make the new node join the cluster (cmrunnode) and run the services.
Use the following steps for deleting a node using online node reconfiguration:
1. Halt the node in the cluster by running cmhaltnode.
2. Edit the cluster configuration file to delete a node(s).
3. Run cmapplyconf.
Managing the Shared Storage
The following describes the confirmation process for Single Node Online volume
Re-Configuration.
The following describes procedures for configuring LVM version 1.0. There are differences
between LVM version 1 and version 2.
116 Maintenance and Troubleshooting