Cloud platform time synchronization method

Abstract

The invention discloses a cloud platform time synchronization method. The method comprises the following steps that 1, a time server is arranged and is used for receiving external reference time; 2, time synchronization priority levels are set for all physical nodes of a physical layer, the physical node of the highest time synchronization priority level is subjected to time synchronization with the time server, and the other physical nodes are subjected to time synchronization with the physical node of the highest time synchronization priority level; 3, the machine time of the resident physical nodes of virtual nodes is obtained by an application software of a virtual layer. According to the cloud platform time synchronization method, time synchronization of the cloud platform physical layer, time sharing of the physical layer and the virtual layer and time synchronization of the virtual layer can be achieved, and the punctuality accuracy and time synchronization accuracy of the virtual layer are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of cloud computing, and in particular relates to a time synchronization method for a physical layer and a virtual layer in a cloud computing platform. Background technique [0002] The cloud platform uses virtualization technology to realize the integration or division of physical resources, and builds a virtual layer by creating a virtual machine; the virtual machine unit running in the virtual layer is also called a virtual node, and user requests are split into different virtual nodes for execution distribution. processing; physical resources, including computing, storage, network and other resources, are the infrastructure of the cloud platform and constitute the physical layer of the cloud platform, where each resource is a physical node. [0003] Today, with the widespread use of cloud platforms, the problem of time synchronization on cloud platforms has become a problem that must be faced and solved. ...

AI Technical Summary

Problems solved by technology

[0006] Regardless of whether the time synchronization is implemented at the physical layer and the virtual layer, or the synchronous time broadcasting technology is adopted from the physical layer to the virtual layer, it is necessary to consider the time synchronization of the virtual layer while synchronizing the time at the physical layer, which increases additional calculation and maintenance costs.

[0007] (2) The time keeping accuracy of the virtual layer is low;

[0008] The physical layer clock is kept using a crystal oscillator, and the punctuality accuracy can reach 1E-5; the virtual layer clock is kept using a software timer, which has problems of low punctuality stability and poor reliability, resulting in the inability to guarantee the punctuality of the virtual layer

Even if the time synchronization of the virtual layer is realized, only the timing calibration of the virtual layer time can be performed, which cannot change the inherent disadvantages of low timing accuracy of the virtual layer

[0009] (3) The time synchronization accuracy of the virtual layer is low;

The reason is that the essence of the virtual layer is a set of application processes running on the physical layer. Due to the double influence of the CPU scheduling mechanism of the physical layer hardware and the simulated CPU scheduling mechanism in the virtual layer, the virtual layer cannot achieve the same time synchronization accuracy as the physical layer.

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