This assignment presents a summary of an article titled 'A Novel Real-Time DDoS Attack Detection Mechanism Based on MDRA Algorithm in Big Data'. The article proposes an efficient method for detecting Distributed Denial of Service (DDoS) attacks using the Multivariate Dimensionality Reduction Analysis (MDRA) algorithm within a Big Data environment. The approach involves three key components: traffic feature dimensionality reduction, traffic feature correlation analysis, and an attack detection framework based on the MDRA algorithm. The article details the experimental methodology, evaluation metrics such as Precision, TNR, FPR, and DR, and compares its effectiveness with previous approaches in terms of time cost and resource consumption.