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System Observability: Logging, Metrics & Tracing (ELK + OpenTelemetry) · Lesson

Understanding Trace Spans and IDs

Learn the building blocks of a trace: spans, trace IDs, and span IDs. Understand how they link together to form a complete request journey.

Tracing Your System's Story

Welcome to Distributed Tracing! Ever wonder exactly what happens when a user clicks a button, and that request travels through many services?

Traditional monitoring struggles with this. Distributed tracing is your solution to understand the full journey of a request across complex systems.

What is a Trace?

Think of a trace as the complete story of a single request or operation as it flows through all the services in your application.

  • It starts when a request enters your system.
  • It ends when the final response is sent.
  • It captures every step in between, no matter how many services are involved.

All lessons in this course

  1. Understanding Trace Spans and IDs
  2. How Distributed Tracing Works
  3. Tracing vs. Logging vs. Metrics
  4. Sampling Strategies for Traces
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