Methods and system to manage data traffic

摘要

A system includes multiple input ports that forward received data (e.g., data packets) to each of multiple queues. Data received at the input ports of the system can be somewhat random or "bursty" at times. That is, the input ports can receive data at a variable bit rate or unspecified bit rate from an internal system source or an external source such as an FTP (File Transfer Protocol) server or SCSI disk array. The queues output data at a constant bit rate. A two-dimensional scheduler associated with the system forces random inbound server traffic from the input ports to adhere to a QoS (Quality of Service) agreement such that the random nature of the inbound traffic does not negatively affect the deterministic guarantees of existing server traffic output from the queues. In other words, techniques herein ensure adherence to QoS requirements among the data flows, without overflowing the queues.