Replication

• Geo-Distributed Systems: WAN Latency, Multi-Leader Replication, and the Speed-of-Light Constraint · 2026-02-13

  How the speed of light shapes the architecture of global-scale systems — from multi-leader and leaderless replication to CRDTs, Spanner, CockroachDB, and the fundamental tension between consistency and latency.

• Database Internals: Storage Engines, Transactions, and Recovery · 2025-12-21

  A deep technical walkthrough of how databases store data, ensure correctness, and recover from crashes — covering B-trees, LSM-trees, write-ahead logging, MVCC, isolation levels, and replication.