← ⚙️ Infrastructure at Scale
Advanced
Transactional outbox and inbox: close database-to-message gaps
Coordinate database changes with reliable event publication. Work through outbox relay crashes, inbox deduplication and the boundaries of external side effects.
View Premium accesscourse lessons, concepts and answers · see current terms
RELATED CONCEPTS
PRACTICE THIS IN REAL QUESTIONS
Incident Response & Production DebuggingCheckout is failing with 'connection pool exhausted', but the database CPU sits at 10 percent. Where is the problem?→Infrastructure as Code & ConfigurationHow does Ansible actually work? Explain inventory, playbooks, modules and why agentless matters.→DevOps System Design & ArchitectureDesign a cron system that schedules two hundred thousand jobs across a shared fleet. What goes wrong at that scale?→DevOps System Design & ArchitectureA payment request times out at the gateway, so the client retries. Design the API so money moves exactly once.→Platform Engineering & FinOpsYour Postgres bill tripled because three years of data live on one hot volume. How do you tier storage without breaking queries?→DevOps System Design & ArchitecturePostgres is out of headroom. How do you choose a shard key, and how do you reshard later without downtime?→