Dynamic migration and optimization method of virtual machines based on remote direct memory access

Abstract

The invention provides a dynamic migration and optimization method of virtual machines based on remote direct memory access. The method comprises the steps: step 1, a source virtual machine transfers synchronous copying information for marking memory change situations to a targeted virtual machine at the beginning of the pre-copying stage; step 2, after the transferring of the copying information is finished, the source virtual machine continues to execute upper-level application service; step 3, the targeted virtual machine sends receipt information to the source virtual machine; step 4, the source virtual machine sends service switching information to the targeted virtual machine; step 5, the targeted virtual machine utilizes on-demand recovery strategies and remotely reads final dirty page data at the backstage by utilizing an RDMA (Remote Direct Memory Access) model; step 6, the targeted virtual machine finishes the synchronization of the final dirty pages and sends migration completion information to the source virtual machine; and the source virtual machine releases all resources. The overall migration time and the service interruption time of the dynamic migration of the virtual machines are shortened, and meanwhile, the influence on the upper-level application service caused by the dynamic migration is reduced.

Description

technical field [0001] The present invention relates to a migration optimization method, in particular to a virtual machine live migration (Live Migration) optimization method based on remote direct memory access. Background technique [0002] The dynamic migration of virtual machines is one of the most important functions in virtualization technology, which is directly related to the high availability and high reliability of application services on the virtualization platform. Therefore, existing commercial and open source virtualization systems (such as VMWare, Xen and KVM, etc.) all provide this function. The performance of virtual machine live migration mainly depends on the virtual machine migration speed and service interruption time. The current mainstream virtual machine dynamic migration is based on the pre-copy technology (Pre-copy), the specific process (see figure 1 shown) as follows: [0003] (1) Migration preparation, finding a suitable target node for the s...

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Problems solved by technology

[0008] However, the remote direct memory access mode needs to consider the data competition problem caused by the direct read and write access of the remote and local virtual machines to the same memory space, which makes the existing dynamic migration method unable to be used directly

In addition, the current migration method dominated by the source virtual machine imposes a huge burden on th

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