HP StorageWorks P9000 Cluster Extension Software Administrator Guide (TB534-96009, February 2011)

If specified in a user configuration file, resource_name is the value of the
APPLICATION tag; otherwise, resource_name is the value of the P9000 Cluster
Extension resource name.
ApplicationStartup
Format String
Description (Optional) 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 disk set (the disk pair has not been
recovered and is not in PAIR state). This process is considered a failback attempt
without prior disk pair recovery.
P9000 Cluster Extension can detect the most current copy of your data based on
the disk state information. If P9000 Cluster Extension detects that the remote disk
array 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 disk array.
If a resynchronization is ordered, P9000 Cluster Extension monitors the progress of
the copy process. If the application service was running on a secondary disk array
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.
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
P9000 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.
Depending on the value configured for the AutoRecover object, P9000 Cluster
Extension attempts to update the former primary disk based on the secondary disk
and swaps the personalities of the disk pair so that the local disk will become the
primary disk.
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.
84 User configuration file and P9000 Cluster Extension objects