PRIMECLUSTER Installation and Administration Guide 4.1 (for Solaris(TM) Operating System)

Chapter 11 Backing Up and Restoring a PRIMECLUSTER System

The PRIMECLUSTER system supports the collective backup and restoration of a variety of environmental files that constitute PRIMECLUSTER, for the purpose of recovering from problems caused by operating errors during upgrading of, or configuration changes to, the system.
The following properties of the PRIMECLUSTER system can be backed up and restored with this function.

CF configuration
SF (Shutdown Facility) configuration
RMS configuration
GUI (including Web-Based Admin View) configuration
GLS (redundant line control function) configuration

The hardware configuration must not change between back up and the restoring .
Among the RMS configuration files, special commands and utilities that can be invoked by the user from the configuration are backed up.
The PRIMECLUSTER backup/restore function cannot backup or restore a GLS (multipath function), GFS, or GDS configuration. For backing up and restoring GLS (multipath function), GFS, and GDS configurations, please refer to the corresponding manuals.
For details on the backup and restoration of PRIMECLUSTER-related products, refer to the corresponding manual.

Prerequisites for backup and restoration

The following conditions must be satisfied to use the backup and restoration functions of PRIMECLUSTER:

PRIMECLUSTER 4.1A10 or later.
The backup/restore function including GLS (redundant line control function) will be available on PRIMECLUSTER 4.1A20 or later.
The version to be used for restoration must be of the same PRIMECLUSTER version as that was used for backup, or later.
Execute the backup procedure on all the nodes in the PRIMECLUSTER operation environment. It is preferable to execute this procedure simultaneously. You can back up in either multi-user or single user mode.

If backup is not executed for all nodes simultaneously, the machines may contain backup data with a different configuration. If the configuration of the backup data differs between machines, the consistency of the cluster configuration cannot be maintained at restoration.
Execute the restoration procedure in single user mode.
- If the OS is newly installed, and the PRIMECLUSTER environment is restored, the normal operations of a cluster system cannot be guaranteed.
- If restoration is not done on all nodes but only on some nodes, the consistency of the cluster configuration might not be maintained between nodes, and failures might occur.
When restoration is to be performed, the hardware configuration must be the same as that used for backup.
With the restoration function, Solaris standard system files cannot be restored. The backup function also cannot be used to back up all the system files in a PRIMECLUSTER system. You need to manually back up or restore the system files, if necessary.
For details on the method of restoring system files that have been backed up with the backup function, refer to Procedure 3) in the explanation of the restoration procedure.

You should back up a cluster configuration each time it is modified.

11.1 Backing Up the PRIMECLUSTER Operation Environment
11.2 Restoring the PRIMECLUSTER Operation Environment
11.3 Environment Setup File

Contents Index