[aparsons]

Sequencing in distributed systems is difficult to handle correctly. When faced with such a situation, it’s often a matter of philosophy rather than technical brilliance - are you willing to accept that failure is inevitable even with a neat “waiter” implementation? What happens if the waiter waits forever? Is shaving seconds tangibly benefitting customers (for Sentry it might) and worth the operational overhead?

Framing these problems slightly differently - is 10 second latency close enough to “real time”? - unlocks solutions like an online batch processor that reads out of your DB (if it doesn’t support NOTIFY) on an indexed incremental identifier.