Volume-based data backup and restore

The volume-based approach backs up the entire global namespace, at the device level, in a single operation and restores the global namespace as a complete namespace. This approach uses the copy services features that exist in the storage subsystems (for example, the FlashCopy® feature of the IBM® TotalStorage® Enterprise Storage Server®).

When performing a volume-based backup, you must be sure to back up the volumes used as volumes in both user storage pools and system storage pool at the same time. All of the volumes in the user storage pools and the system storage pool must be in a static, consistent state, to ensure a static state of the volumes both for the metadata and the user data.

Before performing a volume-based backup, you must quiesce the SAN File System clients and the cluster to ensure a consistent backup. You can also choose to stop the cluster before performing a volume-based backup.

Tip: Use the cluster-transition timestamp to ensure that no unintended cluster transitions occurred during a volume-based backup. The lscluster command to displays the cluster statistics.

Parent topic: Backup and restore

Parent topic: Planning the backup and restore strategy

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