SQS FIFO

• Name needs to be ended with .fifo
• First in first out, guarantee orders
  • using deduplication
  • Ability to do cross-grouped order using message grouping
• Exactly one send capacity
• Limited throughput
  • 300 msg/s without batching
  • 3000 msg/s with batching
    

Example

If we have the message comes in order of [A, B, C, D]. Consumer consume A but not within the SQS Message Visibility Timeout and return back to the queue. The order will still remain the same as [A, B, C, D] because message B can only be consumed after message A