Amazon SQS

Amazon SQS is a fully distributed, highly scalable, reliable, and managed message queuing service. Amazon SQS is easy to scale and decouples microservices, serverless applications, and distributed systems.

This service will help to create message queuing applications and store messages in transit between distributed systems. This application can run on any computer.

With Amazon SQS, you will not lose any messages when you move data between application components, without requiring that each and every component will be available.

Amazon SQS will help you focus on creating and building robust and sophisticated applications without concentrating on how to store, manage, and retrieve messages from any volumes.

Amazon SQS has two types of queues:

• Standard queue: This queue is available for all regions:
  • At-Least-Once Delivery: Message will be delivered a minimum of once and sometimes more than once
  • High Throughput: It supports unlimited number of transactions per second per API action
  • Best-Effort Ordering: Sometimes messages will be delivered but not the same order in which you sent them

You can use this method when the throughput is important.

• FIFO queue: This queue is available in limited regions:
  • Exactly-Once Processing: Messages will be delivered only once and will be available until the customer deletes them. Duplicates will not come into the queue.
  • Limited Throughput: It supports a limited number of transactions. Without batching, it supports 300 messages per second per operation. With maximum batching of 10 messages per operation, it can support up to 3,000 messages per second.
  • First-In-First-Out Delivery: Messages will be delivered in the same order in which you sent them.

You can use this method when the order of events is important.