AWS SQS

Amazon Simple Queue Service (SQS) is a distributed message queuing service introduced by Amazon Web Services (AWS) in 2004. It allows users to send and receive messages through an HTTP API over the internet. SQS is designed with high scalability in mind, making it easy for different components of a system to communicate with each other. Key features of SQS include high scalability, pay-as-you-go pricing, easy setup, and the option to choose between standard and FIFO queues. FIFO queues automatically handle duplicate messages, ensuring tasks are executed only once. SQS also provides error handling with Dead Letter Queues (DLQs), which store messages that could not be processed successfully. The operation of AWS SQS is straightforward. When an application or system needs to send a message, it places the message into an SQS queue. A separate process, known as a "consumer," retrieves and processes these requests. SQS provides an API endpoint for producers to send messages and for consumers to read and process them. There is no limit to the number of messages that can be sent or processed by SQS. An example message structure in SQS might include a message ID, receipt handle, body, and attributes such as sender ID, approximate first receive timestamp, approximate receive count, and sent timestamp. SQS supports messages in any format, including strings, XML, or JSON.