There are several options for controlling Arq via the command line. You can use these options via scripts to adjust Arq's behavior to your liking.
To use any of the following options, run the 'Arq' executable (within the Arq.app bundle) directly from the command line (or a script).
To tell Arq to back up immediately (equivalent to selecting "Back Up Now" from the menu), pause the argument 'backupnow':
Arq backupnow
To tell Arq to pause, pause the argument 'pause' followed by the number of minutes:
Arq pause 10
To tell Arq to resume backing up:
Arq resume
To change the transfer rate ("throttle") that Arq uses, pass the 'setthrottle' argument followed by either'none', 'auto', or 'fixed'. If 'fixed', also pass the desired KB/second:
Arq setthrottle none
Arq setthrottle auto
Arq setthrottle fixed 100