Translations:Overview/15/en
Queues
The AWS Simple Queue System (SQS) is used to manage the exchange of tasks between the different servers in the VPC. For example, an incoming email is analysed by the messaging server, and then put in the processing queue. The processing server then gets the request form the queue and processes it. Once finished, if there is an response email to send, a request is put on the outgoing email queue, and if there is a report to be generated, a request is put on the reporting queue, to be picked up by the next available report server. This approach, known as 'loose coupling', allows complex and processor-intensive tasks to be shared between a cluster of different servers, increasing speed and redundancy.