Async

Asynchronously write data to database.

graph LR;
    Request --> WS[Web Server]
    WS --> MQ[Message Queue]
    WS --> Database
    MQ --> Consumer
    Consumer --> Database

Purpose

• Reduce request times for expensive operations
• Doing periodic job in advance (periodic data aggregation)

Message Queue

• Redis
• Kafka
• RabbitMQ
• Amazon SQS

Task Queues

Back Pressure

Back Pressure limits queue size.

Reference

• Introduction to architecting systems for scale
• System Design Primer