Virtual machine migration prediction method based on SLA

Abstract

The invention relates to the technical field of cloud computing, in particular to a virtual machine migration prediction method based on an SLA (Service Level Agreement). According to the method, firstly, the resource use condition of each virtual machine is monitored once every a period of time; then, after the curve fitting by a mathematical method on the basis of monitoring data, an equation of the curve is obtained; then, the resource quantity used by the virtual machines at the next time interval can be predicted; next, the resource use quantity at the next time interval is compared to the threshold value specified in the SLA; if the resource use quantity at the next time interval exceeds the threshold value, the virtual machine is likely to be about to overload; otherwise, the coming of the next monitoring time interval is waited; and finally, if the overload condition occurs, the virtual machine is migrated to an idle host. The virtual machine migration prediction method based on the SLA provided by the invention has the advantages that an active virtual machine migration strategy is realized through actively predicting the resource use trend of the virtual machine; the problem that the SLA cannot be met after the migration by a conventional migration strategy is solved; and the method can be used for virtual machine migration.

Description

technical field [0001] The invention relates to the technical field of cloud computing, in particular to an SLA-based virtual machine migration prediction method. Background technique [0002] In a cloud computing environment, in order to make full use of resources, it may happen that virtual machines assigned by multiple applications according to the SLA are located on the same server. Moreover, it may also happen that the sum of virtual machine resources exceeds the upper limit of physical resources of the server. When the load of an application increases, the resources of other applications are preempted. At this time, the cloud service provider cannot meet the resource commitment made to the user in the SLA. At this time, virtual machine migration is often used to alleviate the problem. [0003] The traditional method is to isolate the performance of virtual machines based on alarms. This method first monitors the resources of each host. Taking memory as an example, wh...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the resources of the host are very scarce when migration is required, and the virtual machine that cannot meet the SLA will increase the load because it cannot obtain more resources, and the resource load of all virtual machines on this physical machine will be reduced. each approaching a constant

At this time, it is impossible to know which virtual machine needs to be migrated

And if the migrated virtual machine is not a virtual machine that cannot meet the SLA, the virtual machine with a sharp increase in load may still remain on this host, and it is still possible to continue to seize resources, and the situation that cannot meet the SLA may continue to occur

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