HP P6000 Cluster Extension Software Administrator Guide (5697-0986, June 2011)

User configuration file
P6000 Cluster Extension provides a user configuration file to customize failover behavior. You can
specify all customizable objects of P6000 Cluster Extension in this file.
See “User configuration file” on page 73 for more information.
Resource configuration file (Linux only)
The P6000 Cluster Extension resource configuration file is used to configure resources created using
RHCS or SLE HA. The contents of this file are the same as the UCF.cfg file. The APPLICATION name
tag in the file must match the service name property for RHCS and the app name property for SLE
HA.
Force flag
The force flag forces P6000 Cluster Extension to skip the internal logic and enables write access to
the local vdisks regardless of the DR group member state. You can set this flag when you are sure
that the current site contains the latest data, even though a previous application service startup process
failed because P6000 Cluster Extension discovered a DR group member state that could not be
handled automatically.
To use the force flag feature, before starting the application service that uses P6000 Cluster Extension,
you must create a file called application_name.forceflag in the directory specified by the
ApplicationDir property. The application_name is the name of the P6000 Cluster Extension
resource. Before creating this file, ensure that the application service is not running elsewhere. This
file is removed after it is detected by P6000 Cluster Extension.
You cannot use the force flag if the local vdisk state is a combination of destination and copying,
which indicates that a copy operation is in progress. A disk cannot be put in read/write access mode
when a write operation is in progress to that vdisk; in this case, P6000 Cluster Extension returns a
global error.
Planning for P6000 Cluster Extension
Consider the dependencies described in this section before configuring P6000 Cluster Extension.
HP P6000 Command View and HP P6000 SMI-S dependencies
P6000 Cluster Extension depends on HP P6000 Command View and HP P6000/EVA SMI-S, as well
as the cluster software it is integrated with.
Before you configure P6000 Cluster Extension, verify that the host and storage systems are properly
configured. Ensure that:
• The storage system and its remote peer have been properly configured.
• The host system recognizes the storage systems.
• The P6000 Continuous Access links are working properly in both directions.
• You are familiar with the disk configuration of the operating system.
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