Driver

Driver is the component responsible of running a data transfer operation.

Reminder: Dispatcher is responsible of scheduling drivers. When the time comes, driver is the component doing the actual work.

When the driver is executed; it will take the following steps; as seen in databus/driver/primal_driver.py:

• Pull new passengers from the source system
• Seat passengers into the queue
• Notify the source system about seated passengers
• Process seated passengers
• Push seated passengers to the target system

The queue takes note of failures of each step. Driver will retry any failed step on the next schedule. However, users are able to manually alter statuses of each step through the web interface.