LogTree: A Framework for Generating System Events from Raw Textual Logs

Modern computing systems are instrumented to generate huge amounts of system logs and these data can be utilized for understanding and complex system behaviors. One main fundamental challenge in automated log analysis is the generation of system events from raw textual logs. Recent works apply clustering techniques to translate the raw log messages into system events using only the word/term information. In this paper, we first illustrate the drawbacks of existing techniques for event generation from system logs. We then propose Log Tree, a novel and algorithm-independent framework for events generation from raw system log messages. Log Tree utilizes the format and structural information of the raw logs in the clustering process to generate system events with better accuracy. In addition, an indexing data structure, Message Segment Table, is proposed in Log Tree to significantly improve the efficiency of events creation. Extensive experiments on real system logs demonstrate the effectiveness and efficiency of Log Tree.