OrderDistributor.request_backup

You're seeing just the function request_backup, go back to OrderDistributor module for more information.
Link to this function

request_backup()

Requests backups for all other elevators in the node cluster, and merges these backups together with its own. All orders for which the elevator is assigned are signalled to ElevatorOperator, watchdog timers are started for hall calls, and order button lights are set for all orders in the merged backup.

Return

  • :ok :: atom()