Restoring Databases Using the Backup History
The InterSystems IRIS backup utility maintains a backup history to help you restore backups in logical order. The restore utility prompts you for the backups to restore according to their type and order in the backup history.
After restoring the last full backup, the utility uses the information in the backup history to suggest the next logical backup for you to restore and continues through the history. It prompts you to restore subsequent backups in the following order:
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The most recent cumulative backup after the last full backup, if one exists.
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All incremental backups since the last cumulative backup (or if none exists, since the last full backup). It does so in order from the first to the most recent.
You can override the suggested backups in the restore process. Remember, however, that an incremental or cumulative backup does not represent a complete copy of the databases. You can restore an incremental backup only after restoring a full backup.
Important:
On InterSystems IRIS platforms that support access to a database from cluster, you should always back up a given database directory from the same node so that its complete backup history is available if you need to restore the directory.
