This document discusses logs aggregation and analysis using the ELK stack, which consists of Elasticsearch, Logstash, and Kibana. It describes problems with traditional logging like inconsistent formats and high server loads. It then explains how each tool in the ELK stack addresses these issues. Elasticsearch provides centralized storage and search. Logstash collects, parses, and filters logs from multiple sources. Kibana enables visualization and dashboarding for log analysis. Additional tools like Marvel and plugins are also discussed. Overall, the ELK stack provides a scalable logging solution with consistent structure, centralized management, and interactive analytics dashboards.