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flow_control.rst

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Flow Controller Settings

When using :ref:`flow-controllers`, the DataWriter may need specific parameters to be set. Properties related with this feature lie on the fastdds.sfc namespace.

  • Property fastdds.sfc.priority is used to set the priority of the DataWriter for |HIGH_PRIORITY_SCHED_POLICY-api| and |PRIORITY_WITH_RESERVATION_SCHED_POLICY-api| flow controllers. Allowed values are from -10 (highest priority) to 10 (lowest priority). If the property is not present, it will be set to the lowest priority.
  • Property fastdds.sfc.bandwidth_reservation is used to set the percentage of the bandwidth that the DataWriter is requesting for |PRIORITY_WITH_RESERVATION_SCHED_POLICY-api| flow controllers. Allowed values are from 0 to 100, and express a percentage of the total flow controller limit. If the property is not present, it will be set to 0 (no bandwidth is reserved for the DataWriter).