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SDN-based FAST-CNP data transmission method and system

A technology of FAST-CNP and data transmission system, which is applied in the field of SDN-based FAST-CNP data transmission method and system, can solve the problems of not really considering the efficiency of the network card of the sender of CNP messages, aggravating the degree of congestion deterioration, etc. Quality, time-efficiency improvement

Active Publication Date: 2020-09-04
PURPLE MOUNTAIN LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The FAST-CNP protocol is a local optimization based on the DCQCN protocol, which shortens the congestion feedback path, but does not really consider the efficiency of the CNP message reaching the sender network card. If the CNP message encounters congestion during transmission, Then the sender's NIC cannot respond in a timely manner to reduce the speed, thus aggravating the degree of congestion in a short time

Method used

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  • SDN-based FAST-CNP data transmission method and system
  • SDN-based FAST-CNP data transmission method and system
  • SDN-based FAST-CNP data transmission method and system

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Embodiment 1

[0048] like figure 1 As shown, the SDN-based FAST-CNP data transmission system provided by the present invention, the data transmission system includes several SDN controllers, host side systems, smart network cards, and switch systems; wherein,

[0049] The SDN controller is used to provide the NETCONF protocol service, collect the information of the smart network card and the switch, and simultaneously carry the delivery function of the smart network card and the switch information through the NETCONF protocol;

[0050] The smart network card is used to collect data information, set the VxLAN information, decapsulate the VxLAN message, obtain payload information, that is, the CNP message, and then analyze the CNP message, and perform the corresponding QP queue deceleration operation;

[0051] The host side system and the SDN controller establish a NETCONF link, obtain the mapping information of the smart network card on the host side, set the smart network card information o...

Embodiment 2

[0071] like Figure 4 As shown, based on the SDN-based FAST-CNP data transmission system in Embodiment 1, the present invention also provides its transmission method. The implementation of this system solution is divided into two parts of the process: one part: the control plane process. It mainly controls the collection and distribution process of information, which is divided into the smart network card information collection and distribution business process, and the switch information collection and distribution process; the second part: the data plane process. When the control information takes effect, the data plane starts to forward packets according to the control rules, that is, the switch generates CNP packets, which are encapsulated in VxLAN in the management network of the data center and sent to the destination intelligent network card to take effect and reduce the speed.

[0072] The operation process of the system includes the following steps:

[0073] Step 1, ...

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Abstract

The invention discloses an SDN-based FAST-CNP data transmission method and system. The data transmission system comprises a plurality of SDN controllers, a host side system, an intelligent network adapter and a switch system, wherein the intelligent network adapter is used for analyzing a CNP message and carrying out corresponding QP queue speed reduction operation; the switch system, the host side system and the SDN controllers establish a link and are used for controlling interaction of class information; the switch system generates the CNP message and performs VxLAN packaging on the generated CNP message; the destination address of the VxLAN message searches an intelligent network adapter address mapping table according to the destination IP address of the CNP message to obtain the management port IP address of the specified intelligent network adapter; and the source address of the VxLAN message adopts the management port IP address of the switch. According to the invention, the idea of control and forwarding separation based on the SDN is provided, the key control message can be sent to a sender in time directly by means of a control management channel, and discard or delay caused by congestion of the data channel is avoided.

Description

technical field [0001] The invention belongs to the technical field of data center congestion algorithms, in particular to an SDN-based FAST-CNP data transmission method and system. Background technique [0002] The DC-QCN algorithm is based on the combination of Data Center TCP (DCTCP) and Quantized Notification Algorithm (QCN). The original algorithm is presented in the SIGCOMM'15 paper "Congestion control for large scale RDMA deployments". The DC-QCN algorithm relies on ECN marking on the switch side. ECN is a common feature of commercial data center switches. Two bits in the DiffServ field in the IP header of the data packet are used to indicate congestion. Once congestion occurs on the switch side, these two bits are set to "11" (CE). ECN-tagged packets are propagated to the receiver's NIC. The receiver NIC creates a CNP message and sends it to the sender of the ECN-marked packet. The CNP packet includes the information of the marked QP. When the CNP is received ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/815H04L12/801H04L12/741H04L12/46H04L45/74H04L47/22
CPCH04L69/22H04L47/12H04L47/23H04L45/74H04L12/4641H04L2212/00
Inventor 朱华兴汪硕黄韬
Owner PURPLE MOUNTAIN LAB