How real systems fail
On This Lesson 4 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
learn the common failure patterns before analyzing your own system.
Planned topics
- Most outages come from change (deploys, config), capacity, dependencies, and operations errors, not exotic hardware faults.
- Failures cascade: a slow dependency exhausts threads, which makes callers slow, and so on.
- Partial failure and slowness are harder than clean crashes.
- Gray failures: components look healthy but serve wrong or slow results.
Draft outline details
Demonstration
a timeline of a cascading failure from a slow payment provider to checkout thread exhaustion.
Check your understanding
What is usually harder to handle: a crash or a slow dependency?
Show answer
Slow dependency; it ties up resources and spreads.
Practice
Apply this lesson with the module's lab, exercises and quiz.
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