HardDesign: Distributed Task Scheduler (Cron at Scale)
What Redis command is used to implement a distributed lock for exactly-once task execution?
— Tests your understanding of this concept.
Answer Options
AINCR lock:task_id
BSETNX lock:task_id worker_id (SET if Not eXists)
CLPUSH lock:queue task_id
DSUBSCRIBE lock:task_id
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