Please note that the public key (rsa.key) must be downloaded from each PAM Cluster instance using the UI of the Database Backup Scheduler (Config->Database: Schedule Backup).
If you have configured a cluster and want to store backup files for all nodes in the same target folder then is recommended to schedule different times to execute the backup on each node. Else the name of the backup file are the same for the various nodes and may overwrite each other.
The file name nomenclature of the backups are:
Database Backup File Name: "gkscheddb<date><Y%m%d%H%M%S> _ <DBVersion>"
Configuration Backup File Name: "gkschedcfg<date><Y%m%d%H%M%S>_<PAMRelease>"
Therefore it is recommended to store backups of each node in a separate target folder.
Note, if the cluster on all nodes is in sync and good health the PAM database on all nodes are identical, hence a backup might only be performed on one of these nodes.
However the PAM configuration might differ on each node, e.g due to the specific network configuration or different super/config user's password.
Hence the recommendation to perform a backup of the configuration once there were changes.