Caché High Availability Guide - InterSystems Documentation

Restoring from a BackupCaché helps you restore backups in logical order. After restoring the last full backup, theutility uses the backups in the Backup History to suggest the next logical backup for you torestore. It cycles through all of the backups in this way.Having already prompted you with the last full backup, it prompts you to restore subsequentbackups in the following order:1. It prompts you for the most recent cumulative incremental backup after the last fullbackup, if one exists.2. After restoring the most recent cumulative incremental backup, if there was one, it promptsyou to restore all incremental backups since the last cumulative incremental backup (orif none exists, since the last full backup). It does so in order from the first to the mostrecent.You can override the suggested backups in the restore process. Remember, however, thatan incremental or cumulative incremental backup does not represent a complete copy ofyour disk. You can restore an incremental backup only after restoring a full backup.2.6.2 Suspending Database Access During a RestoreIn most cases, the database you are restoring is not fully independent of the other databaseson the system. For this reason, it is recommended that all user activity be suspended duringrestore. Even if you are the only user on your system, you still want to restrict login accessif any users can log in remotely to your system.You can, however, restore a database with users active on other databases. All databasesbeing restored are dismounted during the restore. Therefore, if you did not suspend databaseaccess, users who try to access the databases being restored receive errors.2.6.3 Restoring Database PropertiesIf the characteristics of a directory have changed by the time you do a restore, the restoreutility handles these situations. It creates Caché databases as necessary and modifies theircharacteristics as appropriate, to return them to the state they were in at the time the backupwas completed.Caché High Availability Guide 31