logging - strings, more detailed metrics - deals with aggregated numbers only, simple summary traces - a trace is a path of a single request across a system monitoring - Resources The Log: What every software engineer should know about real-time data’s unifying abstraction Frameworks Time-Series Database (TSDB) Log Frameworks AppDynamics Application Performance Monitoring／Management (APM) AWS - Cloud Trail AWS - CloudWatch Distributed Tracing Infrastructure Grafana Graylog Loki Nagios Core New Relic OpenTelemetry Prometheus Splunk Zabbix Link to original Other Real User Monitoring (RUM) vs Synthetic Monitoring (STM)