system-design 4 Request Coalescing: When a Million Requests Want the Same Data Aug 14, 2026 MySQL Internals: Pages, B+Trees, Indexes, the Optimizer, WAL, Binlog and Replication Aug 13, 2026 Kafka Through a Real Use Case: Building an Uptime Monitoring Pipeline Aug 10, 2026 Redis In and Out: Single Threaded Speed, Expiry, Scripts, Sentinel and Cluster Aug 7, 2026