Amazon Simple Queue Service (Amazon SQS) is a messaging service provided by Amazon.com. It supports programmatic sending of messages by computer programs as a way to communicate over the web. In some sense it could be compared with an instant messaging service for software.
Amazon SQS can be described as commoditization of the messaging service. Well-known examples of messaging service technologies include Java Message Service and Microsoft Message Queuing. Whereas with Java Message Service, for instance, users would have to maintain their own server, Amazon SQS does it for them and sells the service at a per-use rate.
Expected message latency, as of 2007, was 2-10 seconds.
Price, as of 2008, was $0.01 USD per 10,000 messages sent plus bandwidth surcharge if bandwidth usage is significant.
As of 2007, Amazon SQS did NOT guarantee reception of messages by the recipient in the order they were sent by the sender.
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