VIRTUAL QUANTIZED CONGESTION NOTIFICATION

摘要

Congestion management for data traffic in a virtual domain identifies a congestion source and sends a message to the source to adjust data traffic rates. The source may be a virtual machine hosted by a physical server with one or more virtual servers incorporated. A congestion manager may identify the source and send the message to the source without affecting other data sources hosted by the physical server or the virtual servers. In some embodiments, information about the congestion source may be encapsulated in a packet payload readable only by the congestion source so only the congestion source receives the instruction to adjust the transmission rate.

主权项

1. A computer program for controlling congestion of data traffic in a virtual switching device, the computer program product comprising a computer readable storage medium having program code embodied therewith, the program code readable/executable by a processor to:
read the number of data packets in a receiving queue of a virtual switching device; determine if the number of data packets in the receiving queue exceeds a threshold number of data packets for the receiving queue; read a virtual machine source address of the data packets in the receiving queue; and send a notification message to the virtual machine source address instructing the virtual machine source address to decrease rate of transmission of the data packets, wherein information about a congestion virtual machine source is encapsulated in a data packet payload readable by the intended congestion virtual machine source such that the intended congestion virtual machine source receives the notification message, and wherein the notification message is based on a mismatch between a data packet injection rate and a data packet consumption rate, of the receiving queue, over time.