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Design a Notification Service

Design a notification service that can send email, push, and SMS. Notifications do not have to be instant, but they must not be lost.

5,000 RPS
2,000,000 DAU
<2s for enqueuing
SLA 99.95%

Components

Edge type

Hint

Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.

ArchCase

System Design

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