Final answer:
Amazon SQS FIFO queues support multiple consumers while maintaining the message order by grouping messages with the same message group ID, delivering them to only one consumer at a time.
Step-by-step explanation:
The question you’ve asked pertains to Amazon Simple Queue Service (SQS), which is a message queuing service that enables decoupling of the components of a cloud application. Specifically, you are inquiring about the FIFO (First-In-First-Out) queues, which are designed to ensure that messages are processed exactly once, in the exact order that they are sent.
Amazon SQS FIFO queues do indeed support multiple consumers. Multiple consumers can process messages concurrently; however, to preserve the FIFO nature, the queue ensures that there is a strict order in which operations are performed. While each message has a unique message ID, it’s the combination of this ID and a sequence number that strictly orders messages within a single queue.
It is critical to note that even though multiple consumers can access the queue, FIFO queues maintain the order by grouping messages with the same message group ID and delivering them to a single consumer at a time. This prevents another consumer from receiving messages with the same group ID out of order.