A Cloud Server Anomaly Detection Model Based on Time Series Decomposition and Spatiotemporal Information Extraction
Anomaly detection is an important task to maintain cloud data center performance.A large number of cloud servers are running in cloud data centers to implement various cloud computing functions.Since the performance of cloud data centers depends on the normal operation of cloud services,it is crucial to detect and analyze anomalies in cloud servers.To this end,a cloud server anomaly detection model based on time series decomposition and spatiotemporal information extraction-Multi-Channel Bidirectional Wasserstein Generative Adversarial Networks with Graph-Time Network(MCBiWGAN-GTN)is proposed in this paper.Firstly,the Bidirectional Wasserstein GAN with Graph-Time Network(BiWGAN-GTN)algorithm is proposed.This algorithm is built upon the Bidirectional Wasserstein GAN with Gradient Penalty(BiWGAN-GP)algorithm.In this modification,the generator and encoder are replaced by a spatiotemporal information extraction module——Graph-Time Network(GTN)composed of Graph Convolutional Networks(GCN)and Temporal Convolutional Networks(TCN).This modification aims to extract spatiotemporal information from the data,enhancing the capabilities of the algorithm.Secondly,the semi-supervised BiWGAN-GTN algorithm is proposed to identify anomalies in multi-dimensional time series to avoid the risk of abnormal data intrusion during the training process and enhance model robustness.Finally,the MCBiWGAN-GTN is designed to achieve the goal of reducing data complexity and improving model learning efficiency.The Complete Ensemble Empirical Mode Decomposition with Adaptive Noise algorithm(CEEMDAN)is used to decompose the time series data,and then different components are sent to the BiWGAN-GTN algorithm under the corresponding channel for training.The effectiveness and stability of the proposed model are verified on two real-world cloud data center datasets,Clearwater and MBD,using three evaluation metrics:precision,recall and F1 score.Experimental results show that the performance of MCBiWGAN-GTN on these two datasets is stable and better than the compared methods.
Cloud server anomaly detectionTime series data decompositionGenerative Adversarial Networks(GAN)Spatiotemporal information extraction module