Does c-treeRTG support live backup (without needing to get users off the system)?

c-treeRTG offers the ability to perform a dump of the data while the c-tree server is operational.
The dump and recovery utilities are as follows:

• Dynamic Dump -- ctdump Dumps data during Server operation.
• Dump Recovery -- ctrdmp Restores files to state as of last dump.
• Rollback -- ctrdmp Rolls the database state to an earlier time following a dump recovery.
• Roll Forward -- ctfdmp Rolls the database state to a later time following a dump recovery.

You can schedule these with a script.
For more information about these dynamic dumps see: https://docs.faircom.com/doc/faircom-database-backup-guide/