Rate limiting systems and methods for regulating access to a shared network resource in a computing device accessed through an application programming interface. A rate limit associated with a shared network resource is assigned to a user for a time period. During the time period, access to the shared network resource is granted or denied repeatedly based upon the rate limit; a cost is calculated using a cost function; and, the rate limit is updated based upon the cost.

In one embodiment, a time period is identified in which probe packets are to be sent along a path in a network based on predicted user traffic along the path. The probe packets are then sent during the identified time period along the path. Conditions of the network path are monitored during the time period. The rate at which the packets are sent during the time period is dynamically adjusted based on the monitored conditions. Results of the monitored conditions are collected, to determine an available bandwidth limit along the path.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for receiving from a plurality of publishers messages of a first channel of a plurality of distinct channels wherein each channel comprises an ordered plurality of messages, storing messages of the first channel in one or more first buffers according to the order, each first buffer having a respective time-to-live, for one or more connections, determining a respective sampling rate based on a data type of the first channel and a determined latency of the connection, receiving from a subscriber through a first connection a request for messages of the first channel, selecting messages in the first buffers according to the order and the sampling rate, and sending the selected messages using the first connection to the subscriber according to the order.

In one embodiment, a networking device in a network detects an traffic flow conveyed in the network via the networking device. The networking device generates flow data for the traffic flow. The networking device performs a classification of the traffic flow using the flow data as input to a machine learning-based classifier. The networking device performs a mediation action based on the classification of the traffic flow.

In one embodiment, a networking device in a network detects an traffic flow conveyed in the network via the networking device. The networking device generates flow data for the traffic flow. The networking device performs a classification of the traffic flow using the flow data as input to a machine learning-based classifier. The networking device performs a mediation action based on the classification of the traffic flow.

A method of estimating available bandwidth for a network comprising a transmitting device and a receiving device, the method comprising: transmitting a media packet stream over the network to the receiving device, the media packets comprising media data for streaming media at the receiving device; transmitting one or more probe packets over the network so as to test the available bandwidth of the network, wherein the probe packets comprise duplicate data of the media packet stream; and determining, during transmission of the probe packets, a measure of network bandwidth availability in dependence on one or more metrics associated with receiving the media packet stream at the receiving device.

A method of estimating available bandwidth for a network comprising a transmitting device and a receiving device, the method comprising: transmitting a media packet stream over the network to the receiving device, the media packets comprising media data for streaming media at the receiving device; transmitting one or more probe packets over the network so as to test the available bandwidth of the network, wherein the probe packets comprise duplicate data of the media packet stream; and determining, during transmission of the probe packets, a measure of network bandwidth availability in dependence on one or more metrics associated with receiving the media packet stream at the receiving device.

A system and method of communication traffic management on a portable communication device having a computer processor and a network connection to a computer server for transmitting or receiving data with the processor over a network is provided. The method includes: identifying, by a traffic manager application running on the processor, a first application running on the processor and delivering first data to or from the server over the network; intercepting, by the traffic manager application, electronic traffic of the first data to or from the first application or to or from the server; and controlling, by the traffic manager application, a rate of delivery of the first data to or from the first application. The system includes the portable communication device and a nonvolatile storage device coupled to the processor and storing instructions that, when executed by the processor, cause the processor to execute the steps of the method.

A system and method of communication traffic management on a portable communication device having a computer processor and a network connection to a computer server for transmitting or receiving data with the processor over a network is provided. The method includes: identifying, by a traffic manager application running on the processor, a first application running on the processor and delivering first data to or from the server over the network; intercepting, by the traffic manager application, electronic traffic of the first data to or from the first application or to or from the server; and controlling, by the traffic manager application, a rate of delivery of the first data to or from the first application. The system includes the portable communication device and a nonvolatile storage device coupled to the processor and storing instructions that, when executed by the processor, cause the processor to execute the steps of the method.

A system includes a first processor configured to analyze packets received over a communication protocol system and determine one or more congestion indicators from the analysis of the data packets, the one or more congestion indicators being indicative of network congestion for data packets transmitted over a reliable transport protocol layer of the communication protocol system. The system also includes a rate update engine separate from the packet datapath and configured to operate a second processor to receive the determined one or more congestion indicators, determine one or more congestion control parameters for controlling transmission of data packets based on the received one or more congestion indicators, and output a congestion control result based on the determined one or more congestion control parameters.