Building Disaster Recovery Serviceguard Solutions Using Metrocluster with 3PAR Remote Copy for Linux B.01.00.00, July 2013

Restoring replication after a failover
When the Metrocluster package fails over to the remote site and the links are not up or the primary
storage system is not up, Metrocluster issues the setrcopygroup failover command. This
command changes the role of the Remote Copy volume group on the storage system in the recovery
site from Secondary to Primary-Rev. In this role, the data is not replicated from the recovery
site to the primary site. After the links are restored or the primary storage system is restored,
manually issue the setrcopygroup recover command on the storage system in the recovery
site to resynchronize the data from the recovery site to the primary site. This will result in the change
of the role of the Remote Copy volume group on the storage system in the primary site from Primary
to Secondary-Rev.
CAUTION: When the roles are Secondary-Rev and Primary-Rev, a disaster on the recovery
site will result in a failure of the Metrocluster package. To avoid this, immediately halt the package
on the recovery site and start it up on the primary site. This will restore the role of the Remote Copy
volume group to its original role of Primary and Secondary.
Administering Metrocluster with Serviceguard Manager
Steps to administer Metrocluster or the packages configured under Metrocluster using Serviceguard
Manager as follows:
1. Access one of the node’s System Management Home Page available at http://
<nodename>:2301. Log in using the root user’s credentials of the node.
2. Click Tools, if Serviceguard is installed, one of the widgets will have Serviceguard as an
option. Click Serviceguard Manager link within the widget.
3. On the Cluster’s Home Page, click the Administration Tab and choose the available options
when required. Choose appropriate packages for the required option.
Figure 10 Administration options in Serviceguard Manager
Rolling upgrade
Metrocluster configurations follow the HP Serviceguard rolling upgrade procedure. The HP
Serviceguard documentation includes rolling upgrade procedures to upgrade the Serviceguard
version, the operating environment, and other software. This Serviceguard procedure, along with
recommendations, guidelines, and limitations, is applicable to Metrocluster. For more information
on completing a rolling upgrade of HP Serviceguard, see the latest edition of Managing HP
Serviceguard A.11.20.10 for Linux available at http://www.hp.com/go/linux-serviceguard-docs.
24 Administering a Metrocluster with 3PAR Remote Copy for Linux