System Design Interview Crash Course
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Design Google Search

Here is the system design for Google Search.

1. Problem Definition and Scope

We are designing a large-scale web search engine.

The goal is to build a system that autonomously crawls the internet, indexes the content to make it searchable, and serves relevant results to users with extremely low latency.

  • User Groups:
    • Searchers: Users typing queries to find information.
    • Webmasters (Implicit): Content creators whose pages we crawl.
  • Scope:
    • We will focus on the three core pillars:
      1. Crawler: Discovering and fetching pages.
        2

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