A virtual machine scheduling method and device

Abstract

The embodiment of the present application discloses a virtual machine scheduling method and device, which are applied to a host cluster. The host cluster includes multiple hosts, and each host is configured with multiple virtual machine VMs. The VM of the task is put into multiple threads, and each thread includes a preset number of VMs. The mechanism of multi-thread queuing and batch processing is adopted, and each thread sequentially processes the pending tasks of the included VMs. A thread processing to meet the preset condition is used as a condition to trigger the next thread to start processing the pending tasks of the VM included in it, so as to avoid parallel operation of a large number of pending tasks at the same time and cause the memory of the host in the host cluster to be oversubscribed. As a result, problems affecting the performance of the host and the normal operation of the virtual machines on it can effectively avoid the memory over-commitment of the host to a certain extent, and ensure the normal operation of the host and the virtual machines on it.

Description

technical field [0001] The present application relates to the field of computer technology, and in particular to a virtual machine scheduling method and device. Background technique [0002] Usually, multiple virtual machines (English: Virtual Machine, VM for short) are configured on the host, and each VM runs independently on the host, and various software and applications can be installed on these VMs to enrich the services supported on the host , to improve host performance. The host is configured with host memory, and the configured memory will also be allocated to it when the VM is built on it, and each host determines any value between 0.8 and 1.2 as the virtualization degree. [0003] However, in order to ensure the normal operation of the host and its virtual machines, it is necessary to ensure that the host does not overprovision, that is, ensure that the sum of the configured memory of all VMs built on the host does not exceed the product of the host memory and th...

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Problems solved by technology

[0003] However, in order to ensure the normal operation of the host and its virtual machines, it is necessary to ensure that the host does not overprovision, that is, ensure that the sum of the configured memory of all VMs built on the host does not exceed the product of the host memory and the degree of virtualization, because the host oversubscribe In this case, if all the VMs are running at full capacity, not only will the performance of the host be degraded, but the software and applications deployed on the VM will also experience problems such as freezing or even failure to boot.

[0004] In many cases, it is necessary to quickly start a large number of virtual machines, for example: to start up all the VMs on the host, or to migrate a large number of virtual machines at one time, for example: when a host goes down, all VMs on it need to be Migrated to other hosts, it is very easy to have the problem of host memory over-allocation

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