HP 3PAR StoreServ Cluster Extension Software Administrator Guide (5697-2442, July 2013)

If a resynchronization is ordered, HP 3PAR StoreServ Cluster Extension monitors the
progress of the copy process. If the application service was running on a secondary
HP 3PAR StoreServ Storage 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.
Windows cluster
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 HP 3PAR StoreServ Cluster Extension capabilities to
recover a suspended Remote Copy volume group state during a failover, ensure 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
HP 3PAR StoreServ 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.
RESYNCWAIT
The online operation in the local cluster group must wait until the Remote Copy
volume group status is no longer in syncing state. HP 3PAR Remote Copy initiates
a resynchronization of the local virtual volume based on the remote virtual volume.
HP 3PAR StoreServ Cluster Extension monitors the syncing process. If no copy
progress is made after configured ResyncWaitTimeout value, HP 3PAR StoreServ
Cluster Extension returns a global error. If RESYNCWAIT has been specified for the
ApplicationStartup object, the ResyncWaitTimeout object must be specified,
in case HP 3PAR StoreServ Cluster Extension should wait for resynchronization
changes for more or less than 90 seconds, which is the default.
Files application_name.forceflag
CLX_application_name.online
If specified in a user configuration file, resource_name is the value of the
APPLICATION tag; otherwise, resource_name is the value of the HP 3PAR
StoreServ Cluster Extension resource name.
ClusterNotifyCheckTime
Format Integer
APPLICATION objects 53