HP Matrix Operating Environment 7.3 Recovery Management User Guide

3. Select each Recovery Group Set that you want to activate or click the check-box on the left
side of the banner of the Activate Recovery Groups at the Local Site window to select all of
the Recovery Group Sets for activation.
4. Click Activate Recovery Groups to start the activation operation. A window will appear asking
if it is OK to proceed. Click OK and you will be directed to the Jobs tab where you can monitor
the progress of the activation Job.
NOTE: A successful Activate or Deactivate operation ensures that all of the Recovery Groups
within a Recovery Group Set are in the same state (activated or deactivated). However, certain
operations (for example, a Recovery Group edit to change site preference) may result in some
Recovery Groups within a Recovery Group Set being activated and others being deactivated. You
must run an Activate or Deactivate operation on a Recovery Group Set to ensure that all of the
Recovery Groups in that Recovery Group Set are in the same state ( all activated or all deactivated).
Unplanned failover
An unplanned failover typically involves the occurrence of a site-wide event, without prior warning.
This event may be a regional disaster (earthquake, massive flood), or a local problem (power loss
or water main leak in the data center).
An unplanned failover includes a series of steps performed at both sites in the Matrix recovery
management configuration. The following procedure assumes that the CMS and managed resources
running DR Protected logical servers survived an unplanned local event (for example, a power
loss). If the event is more severe, resulting in the permanent loss of the CMS or managed resources,
reconstruction of the site may be necessary.
At the site where the site-wide event occurred:
1. Ensure that the DR Protected logical servers are no longer running in order to prevent a
split-brain situation. As long as the DR Protected logical servers have stopped running, Matrix
recovery management will prevent them from automatically powering up when power is
restored.
Matrix recovery management is able to prevent split-brain from occurring during an unplanned
failover by regulating the auto-power configuration of managed nodes (whether virtual or
physical) that are assigned to DR Protected logical servers so they do not automatically power-up
after an outage. If, for example, a site loses power and site failover is invoked, the site where
the power outage occurred will not resume running the DR Protected logical servers when
power is restored. The managed nodes (whether VC blades or virtual machines) assigned to
DR Protected logical servers stay powered down (and resources remain unassigned) until an
Activate operation is invoked.
At the failover destination (recovery) site:
1. Ensure that enough resources are available to run the recovery logical servers.
2. From the Matrix recovery management Sites tab, click the Activate... button and the Activate
Recovery Groups at the Local Site window will appear.
For more information about the Recovery Groups contained in a Recovery Group Set, select
the Recovery Group Set and click View Recovery Group. A window will appear displaying
the following parameters for each Recovery Group in the Recovery Group Set including:
• Name
• Status
• Type
• Preferred Site
• Secondary Site
• Storage Replication Group Name
30 Testing and failover operations