HP Matrix Operating Environment Software User Manual
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HP Insight Recovery is able to prevent
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 that they do not automatically power up after an
outage. If, for example, the Primary Site loses power and site failover is invoked, the original
Primary Site 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 will stay powered down until the site role is changed to Recovery (and resources are
unassigned).
Target selection and parallelism of activation during a Change local site
to Primary Site operation
The
(LSM) component in HP Insight Dynamics 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,
HP Insight Recovery will ignore the target type preference and place cross technology logical
servers on available supported targets.
LSM allows logical servers to be activated in parallel, exploiting parallelism that is available in
the managed infrastructure. HP Insight Recovery exploits the parallelism of activation available
from LSM when performing a Change Role to Primary operation, to reduce failover time. Two
user accessible settings are available to influence HP Insight Recovery behavior in this area:
•
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.
HP Insight Recovery will ensure that logical servers in a Recovery Group with a lower
Recovery Group Start Order
value will be 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, if you want 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 of activation during a Change local site to Primary Site operation
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