Abstract

Logs are considered the foundation of observability. Logs provide a detailed record of system events, application behavior, and security incidents. As the first pillar of observability, logs play a critical role in helping IT teams understand the health of the systems. This paper explores the different types of logs namely application, system, security, network, and cloud logs. It highlights their importance in modern IT environments. It also examines the challenges of log management, including data volume, noise reduction, real-time analysis, and security concerns. The paper also provides some best practices for effective logging, such as structured logging, centralized log management, and AI-driven log analysis. This paper serves as a comprehensive guide to understanding logs and their role in the broader observability strategy.