HP Matrix Operating Environment 7.3 Recovery Management User Guide

• Start Order
• Power-Up Delay
3. Select each Recovery Group Set that you want to activate at the recovery site. The objective
is for all Recovery Group Sets that were previously activated at the site where the site-wide
event occurred to be activated at the recovery site.
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:
• If the Matrix recovery management configuration has been changed since the failover occurred
(for example, a new Recovery Group was created), the sites must be brought into sync by
making appropriate configuration changes. The Matrix recovery management Site configuration
export and import operations can be used for this purpose.
• A successful Activate or Deactivate operation ensures that all of the Recovery Groups within
a Recovery Group Set are in the same state (enabled or disabled). 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 enabled and others being disabled. You must run
an Activate or Deactivate operation on a Recovery Group Set to ensure that all Recovery
Groups in that Recovery Group Set are in the same state (enabled or disabled).
Target selection and parallelism during an activation operation
The HP Matrix OE logical server management (logical server management) component in the HP
Matrix Operating Environment supports the concept of targets that are most suitable for activating
a logical server based on various criteria, for example, an application may need to run on VC-hosted
logical servers only, to meet a performance requirement.
DR Protected logical servers that can run on both physical and virtual targets (cross technology
logical servers) will be placed on the target type specified as preferred in the site configuration (P
for physical or V for virtual), based on availability. If the preferred target type is not available,
Matrix recovery management will ignore the target type preference and place cross technology
logical servers on available supported targets.
Matrix OE logical server management allows logical servers to be activated in parallel, exploiting
parallelism that is available in the managed infrastructure. Matrix recovery management exploits
the parallelism of activation available from logical server management when performing an Activate
operation, to reduce failover time. Two user accessible settings are available to influence Matrix
recovery management behavior in this area:
• Use Recovery Group Start Order values to determine the workloads that will be brought up
first during the failover process.
If there are workloads that you want to bring up first during the failover process, the Recovery
Group Start Order values for the associated Recovery Groups can be set lower than the values
you set for workloads that can be brought up later in the failover process. Matrix recovery
management ensures that logical servers in a Recovery Group with a lower Recovery Group
Start Order value are activated before logical servers in a Recovery Group with a higher
Recovery Group Start Order value are activated.
• Use the Recovery Group Power-Up Delay parameter to ensure that the logical servers in a
Recovery Group boot in a staggered fashion during the failover process. The Recovery Group
Power-Up Delay parameter sets a minimum delay between the time when one logical server
in the Recovery Group begins its boot process and the time when the next logical server in
the Recovery Group begins its boot process.
Target selection and parallelism during an activation operation 31