Using Serviceguard Extension for RAC, 6th Edition, April 2008

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. Note that there are
differences between LVM version 1 and version 2.
NOTE: When using LVM version 2.0, the volume groups are supported with
Serviceguard. The steps for configuring the volume groups in Serviceguard clusters is
the same for both LVM version 1.0 and 2.0.
For more information on using and configuring LVM version 2.0, see the HP-UX 11i
Version 3: HP-UX System Administrator's Guide: Logical Volume Management located at:
http://docs.hp.com -> Core HP-UX 11iv3 -> LVM Volume Manager
For LVM version 2 compatibility requirements see the
Serviceguard/SGeRAC/SMS/Serviceguard Mgr Plug-in Compatibility and Feature Matrix at
http://docs.hp.com -> High Availability -> Serviceguard -> Support Matrixes
Managing the Shared Storage 151