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A data transmission method and first device

A data transmission method and equipment technology, applied in the field of network communication, can solve the problems of reduced reliability of network transmission and sensitivity to packet loss rate, etc.

Inactive Publication Date: 2019-07-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The RDMA protocol can run on a variety of data link layer protocols, such as Ethernet. With the development of the RDMA protocol, the RDMA protocol is gradually applied to the Ethernet. In this case, the RDMA protocol is sensitive to the packet loss rate. It has gradually emerged that when the RDMA protocol is applied to Ethernet for data transmission, the network devices in the Ethernet need to enable the PFC flow control mechanism to reduce the impact of network packet loss on network transmission efficiency. However, with the PFC flow control mechanism If it is enabled, the reliability of network transmission will also decrease accordingly.

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  • A data transmission method and first device
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Embodiment Construction

[0040] The present application provides a data transmission method and a first device, which are used to reduce the influence of network packet loss on network transmission efficiency and improve the reliability of network transmission at the same time. The technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them.

[0041] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein...

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Abstract

The invention discloses a data transmission method and a first device, which are used for reducing the influence of network packet loss on the network transmission efficiency and improving the reliability of network transmission. The method comprises the steps of the first device stores and picks up an RDMA protocol according to a remote direct storage and first target data is packed into N RDMA messages, the first device orderly sends the N RDMA messages to a second device according to the PSN sequence of the N RDMA messages, wherein each of the N RDMA messages carries a first data writing address; wherein the first data writing address is an address for writing data in each of the N RDMA messages into the second device so that the second device to directly obtain the first data write-inaddress in each RDMA message from each RDMA message, and the target data is written into the storage space corresponding to the first data write-in address.

Description

technical field [0001] The present application relates to the technical field of network communication, and in particular to a data transmission method and a first device. Background technique [0002] Priority-based flow control (PFC) is a flow control mechanism that enhances the traditional Ethernet flow control mechanism, avoids packet loss, and improves network throughput. The PFC flow control mechanism can effectively reduce the packet loss rate of the network, but at the same time, it will also bring problems such as PFC congestion diffusion, PFC deadlock, PFC storm, and PFC transmission distance limitation, which will reduce the reliability of network transmission. [0003] The remote direct memory access (RDMA) protocol is a protocol that directly transfers data from one system to the memory of another system through a network without operating system intervention. The RDMA protocol encapsulates the data to be transmitted into one or more RDMA messages, sends one or...

Claims

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Application Information

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IPC IPC(8): H04L12/823H04L1/18H04L12/855H04L1/16H04L47/32H04L47/2466
CPCH04L47/32H04L47/2466H04L1/1858H04L1/1614H04L67/1097G06F15/17331H04L69/329G06F12/1081H04L1/08H04L12/4633H04L69/324H04L2212/00
Inventor 杨华何春志崔雷苏德现
Owner HUAWEI TECH CO LTD