Hard Design: Notification System
A notification system sends 1,000 notifications/sec. Each notification requires one database read for user preferences. How do you avoid overloading the database?
— Tests your understanding of this concept.
Answer Options
A Scale up the database
B Cache user preferences in Redis with 5-minute TTL
C Store preferences in the notification payload
D Only check preferences for some notifications
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See the Answer on Guru Sishya →This question is from the Design: Notification System topic (System Design Cases).
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