Memory pre-copying and virtual machine migration method and system based on dirty rate prediction
A virtual machine migration and pre-copy technology, applied in the field of virtual machine migration, can solve the problem of not involving memory copy technology, not considering the efficiency of migration, etc., so as to reduce the time of business interruption, improve efficiency, and reduce the number of iterations. Effect
Pending Publication Date: 2021-01-05
NAT UNIV OF DEFENSE TECH
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Although this invention achieves the purpose of rational use of resources by judging the usage of the load and migrating virtual machines, it does not involve the memory copy technology in this application, and does not consider the efficiency of migration
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[0042] like figure 1 , the memory pre-copy method based on dirty rate prediction in this embodiment includes the following steps performed by the source node:
[0043] 1) The number of initialization iterations i is 1, and the i-th round of memory pre-copy is performed to the target node for the target file;
[0044] 2) Determine whether the target file has been copied, if it has been copied, end and exit; if it has not been copied, add 1 to the number of iterations i, and jump to the next step;
[0045] 3) Calculate the dirtying rate of the memory page before the i-th round of memory pre-copy relative to the memory page after the i-1 round of memory pre-copying, if the dirtying rate exceeds the preset upper limit, jump to step 3 again ); otherwise, further judge whether the dirtying rate is lower than the preset lower limit value, if the dirtying rate is not lower than the preset lower limit value, then compress and transmit the dirty page to the destination node, and jump t...
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The invention discloses a memory pre-copying and virtual machine migration method and system based on dirty rate prediction, and the method comprises the steps: calculating the dirty rate of a memorypage before an i round of memory pre-copying relative to a memory page after an (i-1) round of memory pre-copying during each round of memory pre-copying, and if the dirty rate exceeds a preset upper limit value, skipping to re-execute dirty rate detection; otherwise, further judging whether the dirty rate is lower than a preset lower limit value or not, if the dirty rate is not lower thanthe preset lower limit value, compressing and transmitting the dirty page to the destination node, and then executing the next round of memory pre-copying; and if the dirty rate is lower than the preset lower limit value, ending memory pre-copying and exiting. According to the method, the virtual machine downtime caused by memory synchronization can be shortened, the iteration frequency of memorypre-copying is reduced, the online migration efficiency of the virtual machine is improved, and the service interruption time in the online migration process of the virtual machine is shortened.
Description
technical field [0001] The invention relates to a virtual machine migration technology, in particular to a memory pre-copy and virtual machine migration method and system based on dirty rate prediction. Background technique [0002] With the rapid development of the Internet, the data generated by all walks of life has shown an explosive growth trend, and the data that needs to be processed has also grown geometrically. As a result, many existing systems can no longer meet the needs of data processing, so the calculation method has undergone a huge change. The change. In this context, cloud computing has developed rapidly and become the preferred computing method for more and more industries. As the core of cloud computing - virtualization technology, this technology enables the efficient use of a large number of infrastructure resources in the center of the cloud computing platform. Among all the technologies that make up the ecological environment of cloud computing, vir...
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Login to View More IPC IPC(8): G06F9/455
CPCG06F9/45558G06F2009/45562G06F2009/4557G06F2009/45575G06F2009/45583G06F2009/45587
Inventor 黄辰林蹇松雷谭郁松李宝王晓川张建锋董攀丁滟任怡谭霜马俊罗军
Owner NAT UNIV OF DEFENSE TECH