Systems, methods, and computer-readable storage media for providing a notification system are disclosed. The notification system may be configured to select one or more notification requests from each of a plurality of notification request queues, and generate a plurality of attempts for each of the one or more selected notification requests. The attempts may be assigned to one of a first plurality of attempt queues, and flow control logic may be executed against the first plurality of attempt queues to dynamically select attempts for transmission from among the first plurality of attempt queues. Selected attempts are inserted into one of a second plurality of attempt queues, and a plurality of connectors may be configured to select attempts from the second plurality of attempts queues for transmission via a communication channel.

A network switch includes a buffer to store network packets and packet descriptors (PDs) used to link the packets into queues for output ports. The buffer and PDs are shared among the multiple traffic pools. The switch receives a multicast packet for queues in a given pool. The switch determines if there is unused buffer space available for packets in the given pool based on a pool dynamic threshold, if there is unused buffer space available for packets in each queue based on a queue dynamic threshold for the queue, if there are unused PDs available to the given pool based on a pool dynamic threshold for PDs, and if there are unused PDs available for each queue based on a queue dynamic threshold for PDs for the queue. The network switch admits the packet only into the queues for which all of the determining operations pass.