HP StorageWorks XP Cluster Extension Software Administrator Guide (T1656-96035, April 2010)

Default values Linux/UNIX
online file: /etc/opt/hpclx
force flag file: etc/opt/hpclx/conf
Windows
%HPCLX_PATH%
Files resource_name.createsplitbrain
resource_name.forceflag
resource_name.online
If specified in a user configuration file, resource_name is the value of the APPLIC-
ATION tag; otherwise, resource_name is the value of the XP 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 applic-
ation service starts locally or is transferred back to the remote data center (if pos-
sible) 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 at-
tempt without prior disk pair recovery.
XP Cluster Extension can detect the most current copy of your data based on the
disk state information. If XP Cluster Extension detects that the remote XP 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 XP disk array.
If a resynchronization is ordered, XP Cluster Extension monitors the progress of the
copy process. If the application service was running on a secondary XP 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 Fail-
overThreshold 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.
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