AWS-SQS-SNS

SQS

1. http://blog.turret.io/rabbitmq-vs-amazon-sqs-a-short-comparison/
2. https://stackoverflow.com/questions/46880229/migrate-from-amqp-to-amazon-sns-sqs-need-to-understand-concepts
3. https://sookocheff.com/post/messaging/dissecting-sqs-fifo-queues/
4. https://aws.amazon.com/blogs/developer/how-the-amazon-sqs-fifo-api-works/

What Does “FIFO” Mean, Anyhow?

FIFO is only really meaningful when you have one single-threaded sender and one single-threaded receiver.  If there are a bunch of threads or processes writing into a queue, you can’t really even tell if it’s FIFO: the messages show up in the queue depending on when the senders get scheduled.

1. 分布式開放消息系統(RocketMQ)的原理與實踐