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In table 2, the average request failure rate and the average response time under three adjusting methods are recorded. Because the proposed method adjusts VM quantity in the operation mode according to the concurrency amount at intervals and fully considers the failure of each working VM, the MDD is built to obtain the system reliability. The proposed method adjusts the operating mode virtual machine by reliability judgment so the average performance of the experimental results is the best with 0.016% of the average request failure rate and 0.108s of the average response time; the average response time of comparison method 1 is the longest for all VM resources are in operation mode; the average request failure rate and response time of comparison method 2 are lower than the proposed method. The failure rate of the VM is predicted in the proposed method. When the VM failure rate in operation mode is high, the VM is converted to the cold backup mode and the operation mode is replaced by the hot backup mode, which ensures the higher reliability of VM in operation mode. Comparison method 2 only replaces the operating system when the operation mode fails and does not evaluate the reliability of the system. Therefore, the reliability of comparison method 2 is weaker than that of the proposed method. |
IEEE/ICACT20210154 Slide.14
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