System DesignDatabases
Strong vs Eventual Consistency: Pick Your Trade-off
See the real difference between strong and eventual consistency. Interactive simulator shows how banks and social media make different choices.
8 min read
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Databases
How databases store, scale, and stay consistent
9 posts
System DesignDatabases
Replication Topologies: Single-Leader, Multi-Leader, Leaderless
Master database replication patterns. Compare single-leader, multi-leader, and leaderless topologies with interactive visualizations and real-world examples.
10 min read
System DesignDatabases
Cascade Failures: How One Service Takes Down Your Entire System
See how one failing service crashes your entire system. Learn the mechanics behind AWS and Facebook outages.
6 min read
System DesignDatabases
How Discord Stores Trillions of Messages
Learn how Discord stores trillions of messages and why they migrated from MongoDB to Cassandra to ScyllaDB. A deep-dive into their database evolution.
10 min read
System DesignDatabases
How MongoDB Works: A Visual Guide to Document Databases
Learn how MongoDB works from first principles. Interactive simulators for document storage, BSON structure, indexing, and the aggregation pipeline.
10 min read
System DesignDatabases
How PostgreSQL Works: Pages, Indexes, MVCC & WAL Explained
See PostgreSQL internals: 8KB pages, B-tree indexes, MVCC concurrency, and WAL durability. Interactive visual guide.
10 min read
System DesignDatabases
Database Sharding: Why Single Databases Fail at Scale
See why single databases fail at scale. Interactive guide to sharding strategies with Python implementation.
10 min read
System DesignDatabases
Database Replication: How Primary-Replica Keeps Data Safe
See why single databases fail. Interactive guide to primary-replica replication with Python implementation.
10 min read
System DesignDatabases
System Design Simulator: Build, Break, and Fix Databases
Interactive SimCity-style simulator where you build and break infrastructure. Add shards, replicas, and watch cascade failures teach you system design.
10 min read