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Method and system for improving tcp response speed of data center

A technology of response speed and data center network, applied in the direction of digital transmission system, transmission system, data exchange network, etc., can solve problems such as untargeted proposals, achieve the effect of improving TCP response speed and shortening the response time of data packet transmission

Active Publication Date: 2019-04-02
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

[0009] None of the above existing technical research work has pointedly proposed a method to improve the TCP response speed in the data center network environment by improving the initial value of RTO and the setting of RTOmin

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  • Method and system for improving tcp response speed of data center
  • Method and system for improving tcp response speed of data center
  • Method and system for improving tcp response speed of data center

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Embodiment Construction

[0045] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0046] Such as figure 1 As shown, in order to adapt to modern networks with ever-decreasing communication delays, RFC 6298 (a TCP network protocol standard established by the IETF (Internet Engineering Task Force)) proposed that when a TCP connection is established, the initial value of RTO should be changed from 3 seconds to Reduced to 1 second. If no retransmission occurs during the three-way handshake phase, the RTO is equal to 1 second when the data packet starts to be transmitted, otherwise, the value of the RTO is reset to a more conservative 3 seconds. However, the initial value of 1 second is still too large compared to the delay of only a few hundred microseconds in the data center network. If the SYN timeout retransmission occurs during the three-way handshake phase, the entire transmission process will exceed 1 second, which is un...

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Abstract

The invention provides a method and system for improving the TCP response speed of a data center and belongs to the inter-computer communication optimization field. The method includes the following steps that: SRTTold is searched; whether the SRTTold exists is judged, if the SRTTold exists, RTO obtained when a connection is built is calculated according to the SRTTold, if the SRTTold does not exist, the RTO is set to a certain value; a handshake signal SYN is sent when the connection is built, and an acknowledge signal SYN-ACK is received; the value RTOdata of a retransmission timer when data packets are sent is set; a first data packet is sent; and whether data to be sent still exist is judged, if data to be sent still exist, the data are sent, and SRTTold records are dynamically updated until all the data are completely sent. According to the method and system of the invention, the calculation and setting of the initial value of the RTO are optimized, so that TCP streams in the network of the data center can make a quick response to situations such as network packet loss, and therefore, TCP response speed can be greatly improved.

Description

technical field [0001] The invention relates to the field of communication optimization between computers, in particular to a method and system for improving the TCP response speed of a data center. Background technique [0002] TCP is the most widely used transmission protocol at present, it provides end-to-end reliable transmission service. TCP uses flow control mechanism to avoid "congestion collapse". Jacobson V aimed at the problem of "congestion collapse" caused by TCP flow control mechanism and proposed a series of improvement measures. Simply put, TCP increases its data sending rate when the network is idle and decreases its data sending rate when the network becomes congested. TCP uses packet loss as an indicator of network congestion and adjusts its data sending rate accordingly. Due to the lack of ECN to display congestion notification, TCP uses repeated acknowledgment and retransmission mechanisms to infer packet loss and network congestion. The retransmission...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/841H04L12/801H04L1/18
CPCH04L1/1851H04L47/193H04L47/283
Inventor 李大刚王家祥李树一
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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