At least one processing device comprises a processor and a memory coupled to the processor. The at least one processing device is configured to implement adaptive flow control in conjunction with processing of input-output operations in a storage system. The adaptive flow control comprises a first feedback loop in which a window size defining an amount of concurrent processing of the input-output operations in the storage system is adjusted responsive to a measured latency for processing of one or more of the input-output operations. The adaptive flow control further comprises a second feedback loop in which at least one latency threshold used to control adjustment of the window size in the first feedback loop is adjusted. The at least one processing device illustratively comprises at least one processing core of a multi-core storage node of a distributed storage system.

A computerized system having multiple congestion control modules for determining a transmission rate for data traffic towards a destination device over a communication network, the transmission rate updated for specific time intervals, each congestion control module repeatedly collects performance-related data describing performance of content transmitted from the congestion control module to the destination device during specific time intervals, each congestion control module executes a transmission function for computing a next transmission rate for a next time interval, the transmission function receives as input performance-related data associated with prior transmission rates selected at prior time intervals, the transmission function including configurable parameters, the system also including one or more analyzers, each analyzer communicating with one or more of the multiple congestion control modules, where each analyzer periodically executes an adjusting function for reconfiguring the configurable parameters of the function for computing the next transmission rate.

This application discloses a network congestion control method and a network device, and relates to the field of communication technologies, to improve continuity and completion of a packet in a transmission process of a Transmission Control Protocol (TCP) flow. In this application, when pre-congestion (that is, congestion may occur) occurs in a forwarding direction of the TCP flow, a forwarding device reduces a value of a receive window (RWND) field in an acknowledge (ACK) packet, to reduce a sending rate of a transmit end for a packet in the TCP flow or delay sending of a packet by a transmit end. This relieves buffer pressure of the forwarding device, reduces a packet loss, and improves the continuity and the completion of the packet in the transmission process of the TCP flow.

This application discloses a network congestion control method and a network device, and relates to the field of communication technologies, to improve continuity and completion of a packet in a transmission process of a Transmission Control Protocol (TCP) flow. In this application, when pre-congestion (that is, congestion may occur) occurs in a forwarding direction of the TCP flow, a forwarding device reduces a value of a receive window (RWND) field in an acknowledge (ACK) packet, to reduce a sending rate of a transmit end for a packet in the TCP flow or delay sending of a packet by a transmit end. This relieves buffer pressure of the forwarding device, reduces a packet loss, and improves the continuity and the completion of the packet in the transmission process of the TCP flow.

A method for classifying tunneled network traffic including: providing at least one model configured to classify network traffic; retrieving a plurality of packets from a traffic flow; determining input and output statistics of the traffic flow based on the plurality of packets; and classifying, via the at least one model, the traffic flow based on the input and output statistics. A system for classifying tunneled network traffic including: a model making module configured to provide at least one model configured to classify network traffic; a packet processing engine configured to retrieve a plurality of packets from a traffic flow; a data collection module configured to determine input and output statistics of the traffic flow based on the plurality of packets; and a classification module configured to classify, via the at least one model, the traffic flow based on the input and output statistics.

A method for classifying tunneled network traffic including: providing at least one model configured to classify network traffic; retrieving a plurality of packets from a traffic flow; determining input and output statistics of the traffic flow based on the plurality of packets; and classifying, via the at least one model, the traffic flow based on the input and output statistics. A system for classifying tunneled network traffic including: a model making module configured to provide at least one model configured to classify network traffic; a packet processing engine configured to retrieve a plurality of packets from a traffic flow; a data collection module configured to determine input and output statistics of the traffic flow based on the plurality of packets; and a classification module configured to classify, via the at least one model, the traffic flow based on the input and output statistics.

This application provides a congestion control method and a network device. The method includes: receiving a first message sent by a second network device, where the first message carries an active flow quantity, and the active flow quantity is a quantity determined by the second network device based on a data flow to which data packets received from a first network device belong; determining, based on the active flow quantity and rated receiving bandwidth of the second network device, packet sending control information used to send the data flow to the second network device; and sending the data flow to the second network device based on the packet sending control information. This application can better control congestion, thereby reducing network packet loss.

This application describes transmission control methods and devices. One method comprises: sending, by a first device to a second device, first control signaling that instructs the second communications device to send a first group of data packets, the first control signaling comprises a first packet sequence number, a first packet sequence number range, and a first transmission time interval, the first group of data packets correspond to sequence numbers within the first packet sequence number range starting from the first packet sequence number, and the first transmission time interval indicates a time interval for sending data packets of the first group of data packets; and receiving, by the first device from the second device, at least one data packet in the first group of data packets.

At this time, a communication line load transmission interval deciding unit selects a transmission interval from the load of the bus. An instrument load transmission interval deciding unit selects a transmission interval from the processing loads of at least one of the vehicle on-board instrument and the gateway. A delivery control unit compares the transmission interval selected by the communication line load transmission interval deciding unit with the transmission interval selected by the instrument load transmission interval deciding unit, and performs control so that the divided updating data is delivered at transmission intervals which are equal to or greater than the longer of these transmission intervals.

At this time, a communication line load transmission interval deciding unit selects a transmission interval from the load of the bus. An instrument load transmission interval deciding unit selects a transmission interval from the processing loads of at least one of the vehicle on-board instrument and the gateway. A delivery control unit compares the transmission interval selected by the communication line load transmission interval deciding unit with the transmission interval selected by the instrument load transmission interval deciding unit, and performs control so that the divided updating data is delivered at transmission intervals which are equal to or greater than the longer of these transmission intervals.