HP P6000 Cluster Extension Software Administrator Guide (5697-2274, November 2012)

If specified in a user configuration file, resource_name is the value of the
APPLICATION tag; otherwise, resource_name is the value of the P6000 Cluster
Extension resource name.
ApplicationStartup (Optional)
Format String
Description Specifies where a cluster group should be brought online.
The ApplicationStartup object can be customized to determine whether an application
service starts locally or is transferred back to the remote data center (if possible) to
start immediately without waiting for resynchronization. This object is used only if
an application service has already been transferred to the secondary site and no
recovery procedure has been applied to the DR group (the DR group has not been
recovered and is not in a normal state). This process is considered a failback attempt
without prior DR group recovery.
P6000 Cluster Extension can detect the most current copy of your data based on
the DR group information. If P6000 Cluster Extension detects that the remote
P6000/EVA storage system has the most current data, it orders a resynchronization
of the local disk from the remote disk, or it stops the startup process to enable the
cluster software to fail back to the remote P6000/EVA storage system.
If a resynchronization is ordered, P6000 Cluster Extension monitors the progress of
the copy process. If the application service was running on a secondary P6000/EVA
storage system without a replication link, a large number of records may need to
be copied. If the copy process takes longer than the configured application startup
timeout value, the application startup will fail.
MSCS
If the ApplicationStartup resource property is set to FASTFAILBACK, and the
FailoverThreshold value is set to a number higher than the current number of clustered
systems for the service or application, the service or application will restart on
configured nodes until one of the following conditions is met:
• The resource is brought online in the remote data center.
• The resource failed because the FailoverThreshold value has been reached.
• The resource failed because the FailoverPeriod timeout value has been reached.
CAUTION: Disable subsequent automated failover procedures for recovery failback
operations. If you want to use P6000 Cluster Extension capabilities to recover a
suspended DR group state during a failover, make sure that subsequent failover
operations are disabled in case the recovery attempt fails. To disable subsequent
failover attempts, set the FailoverThreshold to zero (0) until the recovery operation
has finished successfully.
Valid values FASTFAILBACK (default)
The cluster group is brought online in the remote data center (if possible) without
waiting for resynchronization. The application startup process is stopped locally and
P6000 Cluster Extension reports a data center error. Depending on the cluster
software, the application service cannot start on any system in the local data center,
and the cluster software transfers the application service back to the remote data
center. Use this value to provide the highest level of application service availability.
In a two-node cluster, this process does not work because the target failback system
is not available. In this case, the application service must be started manually, or
the ApplicationStartup object must be set to RESYNCWAIT.
46 User configuration file and P6000 Cluster Extension objects