System Design Interview Roadmap

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Hot Partitions: Detecting and Handling Data Skew

Hot Partitions: Detecting and Handling Data Skew

Issue #96: System Design Interview Roadmap

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System Design Roadmap
Jul 15, 2025
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System Design Interview Roadmap
Hot Partitions: Detecting and Handling Data Skew
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What We'll Learn Today

  • Understanding Hot Partitions: Why data distribution breaks and when it becomes dangerous

  • Detection Mathematics: Entropy calculations and temporal pattern recognition that catch problems early

  • Enterprise Solutions: Real strategies from Discord, Spotify, and other major platforms

  • Mitigation Techniques: Dynamic rebalancing, circuit breakers, and load shedding approaches

  • Hands-On Implementation: Build a complete detection system with real-time monitoring

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