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#Scalability

8 articles

High Level Design

Choosing the Right Database

A practical decision framework for picking the right database in a system design interview — relational, key-value, wide-column, document, graph, time-series, search, and blob storage compared.

Sep 18, 2026
System DesignDatabaseArchitecture

High Level Design

Design a Chat System

End-to-end design of a real-time chat system for 50M DAU — covering WebSocket protocol choice, message fanout, multi-device sync, presence management, and media storage.

Sep 18, 2026
System DesignChatWebSocket

High Level Design

Design a Video Streaming Service

End-to-end design of a YouTube-like video platform — uploading flow, adaptive streaming, DAG-based transcoding pipeline, CDN cost optimizations, pre-signed URLs, DRM, and fault-tolerant error handling.

Aug 21, 2026
System DesignVideo StreamingCDN

High Level Design

Load Balancing

Load balancers, routing algorithms, Layer 4 vs Layer 7 balancing, health checks, and how traffic flows through a real system.

Aug 10, 2026
System DesignLoad BalancingScalability

High Level Design

Scalability: The Basics

Core concepts of scalability — vertical vs horizontal scaling, components that improve it, and trade-offs every system designer must reason about.

Aug 10, 2026
System DesignScalabilityArchitecture

High Level Design

Designing a Load Balancer

End-to-end design of a production-grade load balancer — control and data planes, health checking, session persistence, SSL termination, and high-availability with active-active failover.

Aug 10, 2026
System DesignLoad BalancingScalability

High Level Design

Design a Rate Limiter

A comprehensive study guide to designing a production-grade rate limiter. Covers placement strategies, five core algorithms with trade-offs, high-level and detailed design, and distributed system challenges like race conditions and synchronization.

Aug 9, 2026
System DesignRate LimitingAPI Design

High Level Design

Design a News Feed System

Designing a scalable news feed system requires balancing: Write efficiency vs read latency Cache size vs data freshness Push vs pull models Throughput vs storage cost

Dec 1, 2025
System DesignNews FeedSocial Media