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Concept guides/Consistency and money/Coupon service (distributed locks)

System designConsistency and money

Coupon service (distributed locks)

Hard3 min read

Questions it teaches

Distributed cron single-execution guaranteeMedium35 min Workflow instance locking and recoveryMedium40 min Coupon redemption serviceMedium35 min Flash-sale inventory overselling preventionHard40 min Scheduled jobs platformHard45 min Distributed lock serviceHard45 min Safe distributed lock redesignHard45 min

Related

Consistency and money Messaging and streams Data modeling and storage Scale and caching Real-time systems Backend internals Reliability and failover

Builds on: Messaging and streams

Designing team chat3 min Real-time personalization4 min

Builds on: Data modeling and storage

Designing a parking lot4 min Designing a pastebin3 min

Related: Scale and caching

Connection pool proxy3 min Connection pooling proxy (gateway)3 min

Related: Real-time systems

Short polling for presence4 min URL routing3 min

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