(9) Where should I use the Amazon SQS service? - Quora

(9) Where should I use the Amazon SQS service? - Quora

One way to accomplish this would be to post a message to an SQS queue (or perhaps multiple messages to multiple queues, depending on how you architect it).  The message(s) describe work that needs to be performed on the newly uploaded image file.  Once the message has been written to SQS, your application can return a success to the user because you know that you have the image file and you have scheduled the processing.

In the background, you can have servers reading messages from SQS and performing the work specified in the messages.  If one of those servers dies another one will pick up the message and perform the work.  SQS guarantees that a message will be delivered eventually so you can be confident that the work will eventually get done.

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