Research On Reliability Of Multi-way Civil Aviation Storage System With Proactive Fault Tolerance

With the rapid development of the civil aviation industry,the amount of civil aviation data is growing rapidly,and the scale of civil aviation storage systems is also growing.However,in large-scale civil aviation storage systems,disk failures,node,and rack component failures lead to failures with increasing frequency.It is far from enough to use replication technology to ensure system reliability.This method of reactive fault tolerance method will not only increase system redundancy,but also cause system data loss due to a large data recovery window.This paper studies the reliability of the multi-way civil aviation storage system with proactive fault tolerance.By realizing the advanced prediction and proactive processing of potential failures of disks,it can make up for the defect of reactive fault tolerance to a certain extent and fundamentally improve the reliability of civil aviation storage systems.Aiming at the problem of incomplete consideration of storage system failure types,this paper constructs the state transition model for civil aviation storage system based on the disk failure prediction model.This model comprehensively considers the three factors of the disk,node,and rack failures.According to the system state transition model,an improved eventdriven Monte-Carlo simulation method is provided to conduct a comprehensive reliability analysis of the civil aviation storage system.In the process of simulation,Weibull distribution is used to simulate the occurrence of civil aviation storage system events,and the expected number of data-loss events during a period in the systems is counted.The experimental results show that the reliability of the 2-way replication and 3-way replication of civil aviation storage systems is increased by 2.6 times and 6.3 times,respectively,by comprehensively considering the failure factors.At the same time,the model also effectively saves network bandwidth resources.Aiming at the problem of low effective utilization of the storage space of the replication strategy,this paper firstly compares and analyzes the performance of different fault tolerance mechanisms.Taking advantage of proactive fault tolerance technology,an adaptive switching model of replication strategy for the civil aviation storage system with proactive fault tolerance based on the disk failure prediction model is constructed.In this model,under the condition of comprehensive consideration of failure factors,combined with the frequency of disk failures,different replica storage strategies are selected for civil aviation data.At the same time,an event-driven Monte-Carlo reliability simulation method is designed to successfully implement the model.The experimental results show that the model has a lower fault tolerance cost,more reasonable storage space,and higher fault tolerance quality.