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Distributed databases, as the core infrastructure software for internet applications, play a critical role in modern cloud services. However, existing distributed databases frequently experience system failures and performance degradation,…

Databases · Computer Science 2025-05-06 Lingzhe Zhang , Tong Jia , Mengxi Jia , Ying Li

Modern telecom systems are monitored with performance and system logs from multiple application layers and components. Detecting anomalous events from these logs is key to identify security breaches, resource over-utilization,…

Machine Learning · Computer Science 2022-12-22 Abhishek Sarkar , Tanmay Sen , Srimanta Kundu , Arijit Sarkar , Abdul Wazed

Software systems often record important runtime information in logs to help with troubleshooting. Log-based anomaly detection has become a key research area that aims to identify system issues through log data, ultimately enhancing the…

Software Engineering · Computer Science 2025-04-15 Wei Guan , Jian Cao , Shiyou Qian , Jianqi Gao , Chun Ouyang

Fully supervised log anomaly detection methods suffer the heavy burden of annotating massive unlabeled log data. Recently, many semi-supervised methods have been proposed to reduce annotation costs with the help of parsed templates.…

Software Engineering · Computer Science 2023-04-12 Hongcheng Guo , Yuhui Guo , Renjie Chen , Jian Yang , Jiaheng Liu , Zhoujun Li , Tieqiao Zheng , Weichao Hou , Liangfan Zheng , Bo Zhang

Log data are generated from logging statements in the source code, providing insights into the execution processes of software applications and systems. State-of-the-art log-based anomaly detection approaches typically leverage deep…

Software Engineering · Computer Science 2025-03-12 Xingfang Wu , Heng Li , Foutse Khomh

As the IT industry advances, system log data becomes increasingly crucial. Many computer systems rely on log texts for management due to restricted access to source code. The need for log anomaly detection is growing, especially in…

Machine Learning · Computer Science 2023-11-10 Gunho No , Yukyung Lee , Hyeongwon Kang , Pilsung Kang

Logs play a crucial role in system monitoring and debugging by recording valuable system information, including events and states. Although various methods have been proposed to detect anomalies in log sequences, they often overlook the…

Machine Learning · Computer Science 2023-09-13 Yufei Li , Yanchi Liu , Haoyu Wang , Zhengzhang Chen , Wei Cheng , Yuncong Chen , Wenchao Yu , Haifeng Chen , Cong Liu

Software-intensive systems produce logs for troubleshooting purposes. Recently, many deep learning models have been proposed to automatically detect system anomalies based on log data. These models typically claim very high detection…

Software Engineering · Computer Science 2022-02-16 Van-Hoang Le , Hongyu Zhang

Log anomaly detection is a critical task for system operations and security assurance. However, in networked systems at scale, log data are generated at massive scale while instance-level annotations are prohibitively expensive, posing…

Machine Learning · Computer Science 2026-05-13 Yutszyuk Wong , Wentai Wu , Yuen-Ying Yeung , Weiwei Lin

Modern software systems generate extensive heterogeneous log data with dynamic formats, fragmented event sequences, and varying temporal patterns, making anomaly detection both crucial and challenging. To address these complexities, we…

Artificial Intelligence · Computer Science 2025-12-17 Przemek Pospieszny , Wojciech Mormul , Karolina Szyndler , Sanjeev Kumar

Within today's large-scale systems, one anomaly can impact millions of users. Detecting such events in real-time is essential to maintain the quality of services. It allows the monitoring team to prevent or diminish the impact of a failure.…

Artificial Intelligence · Computer Science 2023-04-25 Arthur Vervaet

Log-system is an important mechanism for recording the runtime status and events of Web service systems, and anomaly detection in logs is an effective method of detecting problems. However, manual anomaly detection in logs is inefficient,…

Machine Learning · Computer Science 2024-11-26 Jiawei Lu , Chengrong Wu

Anomaly detection is a longstanding and active research area that has many applications in domains such as finance, security, and manufacturing. However, the efficiency and performance of anomaly detection algorithms are challenged by the…

Machine Learning · Computer Science 2025-04-16 Yang Cao , Haolong Xiang , Hang Zhang , Ye Zhu , Kai Ming Ting

Log-based anomaly detection (LogAD) is critical for maintaining the reliability and availability of large-scale online service systems. While machine learning, deep learning, and large language models (LLMs)-based methods have advanced the…

Software Engineering · Computer Science 2025-10-28 Junjie Huang , Minghua He , Jinyang Liu , Yintong Huo , Domenico Bianculli , Michael R. Lyu

Anomaly detection becomes increasingly important for the dependability and serviceability of IT services. As log lines record events during the execution of IT services, they are a primary source for diagnostics. Thereby, unsupervised…

Machine Learning · Computer Science 2021-09-21 Thorsten Wittkopp , Alexander Acker , Sasho Nedelkoski , Jasmin Bogatinovski , Dominik Scheinert , Wu Fan , Odej Kao

Logs are an essential source of information for people to understand the running status of a software system. Due to the evolving modern software architecture and maintenance methods, more research efforts have been devoted to automated log…

Software Engineering · Computer Science 2024-04-09 Xingfang Wu , Heng Li , Foutse Khomh

Detecting anomalous events in online computer systems is crucial to protect the systems from malicious attacks or malfunctions. System logs, which record detailed information of computational events, are widely used for system status…

Cryptography and Security · Computer Science 2021-03-09 Haixuan Guo , Shuhan Yuan , Xintao Wu

Debugging of large software systems consisting of many processes accessing shared resources is a very difficult task. Many commercial systems record essential events during system execution for post-mortem analysis. However, the event…

Software Engineering · Computer Science 2007-05-23 Raymond Smith , Bogdan Korel

Artificial intelligence operations (AIOps) play a pivotal role in identifying, mitigating, and analyzing anomalous system behaviors and alerts. However, the research landscape in this field remains limited, leaving significant gaps…

Machine Learning · Computer Science 2023-12-13 Daksh Dave , Gauransh Sawhney , Dhruv Khut , Sahil Nawale , Pushkar Aggrawal , Prasenjit Bhavathankar

In the evolving IT landscape, stability and reliability of systems are essential, yet their growing complexity challenges DevOps teams in implementation and maintenance. Log analysis, a core element of AIOps, provides critical insights into…

Machine Learning · Computer Science 2025-09-11 Thorsten Wittkopp