Your auction platform is getting busier and your dev team added a number of new features. Your auction platform receives the three bids and sends them to a FIFO queue before they are processed.Īdding complexity with multiple message groupsĪ new challenge arises. Ties are awarded to the first bidder at that price so it is important to track which arrived first. Here’s how a FIFO queue helps you keep all your transactions in one straight flow.Ī seller currently is holding an auction for a laptop, and three different bids are received for the same price. Your platform requires that transactions from buyers and sellers get processed in exactly the order received. Suppose that you run a major auction platform where people buy and sell a wide range of products. It also covers the behavior of message groups in depth and explains why message groups are key to understanding how FIFO queues work. This post walks through some common situations to identify the exact behavior that you can expect. FIFO queues are designed to guarantee that messages are processed exactly once in the exact order that they are received and have a default rate of 300 transactions per second.Īs customers explore SQS FIFO queues, they often have questions about how the behavior works when messages arrive and are consumed.Standard SQS queues are able to scale to enormous throughput with at-least-once delivery.Amazon Simple Queue Service (Amazon SQS) is a fully managed queuing service that helps decouple applications, distributed systems, and microservices to increase fault tolerance.
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