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Logs generated by large-scale software systems provide crucial information for engineers to understand the system status and diagnose problems of the systems. Log parsing, which converts raw log messages into structured data, is the first…

Software Engineering · Computer Science 2023-02-16 Van-Hoang Le , Hongyu Zhang

Log parsing is a fundamental step for automated log analysis, which transforms raw log messages into structured formats. Existing syntax-based parsers struggle with complex logs because they lack semantic reasoning ability. Emerging…

Software Engineering · Computer Science 2026-05-26 Shiwen Shan , Yintong Huo , Minxing Wang , Zhiying Wu , Yuxin Su , Zibin Zheng

Log parsing transforms raw logs into structured templates containing constants and variables. It underpins anomaly detection, failure diagnosis, and other AIOps tasks. Current parsers are mostly reactive and log-centric. They only infer…

Software Engineering · Computer Science 2025-12-05 Jiaqi Sun , Wei Li , Heng Zhang , Chutong Ding , Shiyou Qian , Jian Cao , Guangtao Xue

Log parsing serves as an essential prerequisite for various log analysis tasks. Recent advancements in this field have improved parsing accuracy by leveraging the semantics in logs through fine-tuning large language models (LLMs) or…

Software Engineering · Computer Science 2024-08-09 Junjie Huang , Zhihan Jiang , Zhuangbin Chen , Michael R. Lyu

Log data provides crucial insights for tasks like monitoring, root cause analysis, and anomaly detection. Due to the vast volume of logs, automated log parsing is essential to transform semi-structured log messages into structured…

Machine Learning · Computer Science 2025-05-16 Viktor Beck , Max Landauer , Markus Wurzenberger , Florian Skopik , Andreas Rauber

The emergence of large language models (LLMs) like GPT-4 has revolutionized natural language processing (NLP), enabling diverse, complex tasks. However, extensive token counts lead to high computational and financial burdens. To address…

Computation and Language · Computer Science 2025-03-12 Yun-Hao Cao , Yangsong Wang , Shuzheng Hao , Zhenxing Li , Chengjun Zhan , Sichao Liu , Yi-Qi Hu

System-generated logs are typically converted into categorical log templates through parsing. These templates are crucial for generating actionable insights in various downstream tasks. However, existing parsers often fail to capture…

Computation and Language · Computer Science 2025-06-03 Prerak Srivastava , Giulio Corallo , Sergey Rybalko

Any modern system writes events into files, called log files. Those contain crucial information which are subject to various analyses. Examples range from cybersecurity, intrusion detection over usage analyses to trouble shooting. Before…

Machine Learning · Computer Science 2022-02-02 Nadine Ruecker , Andreas Maier

Logs are extensively used during the development and maintenance of software systems. They collect runtime events and allow tracking of code execution, which enables a variety of critical tasks such as troubleshooting and fault detection.…

Machine Learning · Computer Science 2020-03-20 Sasho Nedelkoski , Jasmin Bogatinovski , Alexander Acker , Jorge Cardoso , Odej Kao

Log parsing has been a long-studied area in software engineering due to its importance in identifying dynamic variables and constructing log templates. Prior work has proposed many statistic-based log parsers (e.g., Drain), which are highly…

Software Engineering · Computer Science 2024-12-09 Qiaolin Qin , Roozbeh Aghili , Heng Li , Ettore Merlo

Modern software systems generate massive volumes of runtime logs, necessitating efficient and accurate log parsing to enable critical downstream tasks such as anomaly detection and root cause analysis. Recently, large language models (LLMs)…

Software Engineering · Computer Science 2025-09-17 Yilun Wang , Pengfei Chen , Haiyu Huang , Zilong He , Gou Tan , Chuanfu Zhang , Jingkai He , Zibin Zheng

Large language models (LLMs) are often used for infilling tasks, which involve predicting or generating missing information in a given text. These tasks typically require multiple interactions with similar context. To reduce the computation…

Computation and Language · Computer Science 2025-05-30 Tianyu Guo , Hande Dong , Yichong Leng , Feng Liu , Cheater Lin , Nong Xiao , Xianwei Zhang

Large language models (LLMs) have shown promise for event log analysis, but their high computational requirements, reliance on cloud infrastructure, and security concerns limit practical deployment. In addition, most existing approaches…

Cryptography and Security · Computer Science 2026-05-08 Siraaj Akhtar , Saad Khan , Simon Parkinson

Logs provide users with useful insights to help with a variety of development and operations tasks. The problem is that logs are often unstructured, making their analysis a complex task. This is mainly due to the lack of guidelines and best…

Software Engineering · Computer Science 2021-11-01 Issam Sedki , Abdelwahab Hamou-Lhadj , Otmane Ait-Mohamed

A long standing goal of the data management community is to develop general, automated systems that ingest semi-structured documents and output queryable tables without human effort or domain specific customization. Given the sheer variety…

Computation and Language · Computer Science 2025-03-10 Simran Arora , Brandon Yang , Sabri Eyuboglu , Avanika Narayan , Andrew Hojel , Immanuel Trummer , Christopher Ré

Large Language Models (LLMs) have recently made significant advances in code generation through the 'Chain-of-Thought' prompting technique. This technique empowers the model to autonomously devise "solution plans" to tackle intricate…

Software Engineering · Computer Science 2024-03-21 Zhihong Sun , Chen Lyu , Bolun Li , Yao Wan , Hongyu Zhang , Ge Li , Zhi Jin

Due to the sheer size of software logs, developers rely on automated log analysis. Log parsing, which parses semi-structured logs into a structured format, is a prerequisite of automated log analysis. However, existing log parsers are…

Software Engineering · Computer Science 2026-03-16 Yifan Wu , Bingxu Chai , Siyu Yu , Ying Li , Pinjia He , Wei Jiang , Jianguo Li

With the increasing complexity and rapid expansion of the scale of AI systems in cloud platforms, the log data generated during system operation is massive, unstructured, and semantically ambiguous, which brings great challenges to fault…

Artificial Intelligence · Computer Science 2025-06-24 Cheng Ji , Huaiying Luo

Leadership-class HPC systems generate massive volumes of heterogeneous, largely unstructured system logs. Because these logs originate from diverse software, hardware, and runtime layers, they exhibit inconsistent formats, making structure…

Artificial Intelligence · Computer Science 2026-04-08 Ahmad Maroof Karimi , Jong Youl Choi , Charles Qing Cao , Awais Khan

Large Language Models (LLMs) are revolutionizing how users interact with information systems, yet their high inference cost poses serious scalability and sustainability challenges. Caching inference responses, allowing them to be retrieved…

Machine Learning · Computer Science 2026-02-16 Xutong Liu , Baran Atalar , Xiangxiang Dai , Jinhang Zuo , Siwei Wang , John C. S. Lui , Wei Chen , Carlee Joe-Wong