System Design Interview - Distributed Message Queue

Topics mentioned in the video:
- Synchronous vs asynchronous communication.
- Functional (send message and receive message) and non-functional (scalability, high availability, high performance, durability) requirements.
- High-level architecture of a distributed message queue.
- VIP, Load balancer
- FrontEnd service and its responsibilities (request validation, authentication and authorization, SSL termination, server-side data encryption, caching, rate limiting (throttling), request dispatching, request de-duplication, usage data collection).
- Metadata service, distributed cache, consistent hashing ring.
- Data storage options (leader-follower, cell-based architecture).
- Data replication, message delivery semantics (at most once, at least once, exactly once), push vs pull, FIFO and message ordering, security, monitoring.

Inspired by the following interview questions:

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[yooos]

wow! This is so to the point and even the duration of the video is as good as an actual interview discussion! Touched so many "must know" topics!

[jackson-xe]

This is the best distributed message queue system design I have seen so far. Many good concepts introduced and summarized, I feel it very helpful by using it as a guideline and read the other documents for more details such as the AWS SQS document. Looking forward to more content in the future.

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