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You add ON DELETE CASCADE to a foreign key. You delete a test organization. It cascades to users, which cascades to sessions, orders, invoices, activity_logs — 10,000 rows gone in milliseconds. No warning, no undo. Cascade deletes are powerful and dangerous.
Design origin and CDN architecture for global scale. Master cache invalidation, edge routing, WAF integration, and failover strategies.
Debezium captures database changes at the source: WAL logs for PostgreSQL, binlog for MySQL. Stream changes to Kafka, Redis, Elasticsearch, or vector DBs instantly.
Run controlled failure experiments to expose weak points in your system. Gamedays, AWS FIS, automated chaos, and learning reviews that build institutional knowledge.
You added a circuit breaker to protect against cascading failures. But it never opens — requests keep failing, the downstream service stays overloaded, and your system doesn''t recover. Here''s why circuit breakers fail silently and how to configure them correctly.