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Grokking Modern System Design Interview

Introduction to Distributed Monitoring

Explain the role of distributed monitoring in system design for preventing cascading failures and outages. Define the two primary fault categories: server-side errors and client-side errors. Describe how effective monitoring reduces operational costs and improves system reliability.

We'll cover the following...

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  • <a href=”#Need-for-monitoring" aria-label=“Read more about Need for monitoring” >Need for monitoring
    • <a href="#Downtime-cost" aria-label=“Read more about Downtime cost” >Downtime cost
    • <a href="#Types-of-monitoring" aria-label=“Read more about Types of monitoring” >Types of monitoring
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Need for monitoring

A single service failure can disrupt the execution of dependent systems. To prevent cascading failures, monitoring provides early warnings and helps identify the root cause of faults.

Consider a scenario where a user uploads a video, intro-to-system-design, to YouTube:

  • The UI service (server A) receives the video and passes data to service 2 (server B).

  • Service 2 writes to the database and stores the video in blob storage.

  • Service 3 (server C) manages replication between database X and database Y.

If service 3 fails, the replication pipeline is interrupted. Service 2 ...