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    <p>The use-cases for <a href="http://kafka.apache.org/" rel="noreferrer">Kafka</a> and <a href="http://aws.amazon.com/sqs/" rel="noreferrer">Amazon SQS</a>/<a href="http://aws.amazon.com/sns/" rel="noreferrer">Amazon SNS</a> are quite different.</p> <p>Kafka, as you wrote, is a distributed publish-subscribe system. It is designed for very high throughput, processing thousands of messages per second. Of course you need to setup and cluster it for yourself. It supports multiple readers, which may "catch up" with the stream of messages at any point (well, as long as the messages are still on disk). You can use it both as a queue (using consumer groups) and as a topic.</p> <p>An important characteristic is that you cannot selectively acknowledge messages as "processed"; the only option is acknowledging all messages up to a certain offset.</p> <p>SQS/SNS on the other hand:</p> <ul> <li>no setup/no maintenance</li> <li>either a queue (SQS) or a topic (SNS)</li> <li>various limitations (on size, how long a message lives, etc)</li> <li>limited throughput: you can do batch and concurrent requests, but still achieving high throughputs would be expensive</li> <li>I'm not sure if the messages are replicated; however at-least-once guarantee delivery in SQS would suggest so </li> <li>SNS has notifications for email, SMS, SQS, HTTP built-in. With Kafka, you would probably have to code it yourself</li> <li>no "message stream" concept</li> </ul> <p>So overall I would say SQS/SNS are well suited for simpler tasks and workloads with a lower volume of messages.</p>
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    1. COthank you for reply. I spent some time and red about kafka. I have to say that I like it a lot. But one part is still unclear. In kafka model producer-broker-consumer. Producer should be very sophisticated mechanism, that will use use some load balancer probably with round robin algorithm... Am I right? Because from my point of view one producer should load more into broker than "similar" consumer can read, right?
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    2. CONo, producers can be simple, just sending messages to Kafka. See "Automatic producer load balancing" in http://kafka.apache.org/07/design.html.
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    3. COThank you. This explains everything
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