Interleaving multiple ordered message groups in Amazon SQS

To interleave multiple ordered message groups within a single FIFO queue, assign a MessageGroupId to each group (for example, session data for different users). This allows multiple consumers to read from the queue simultaneously while ensuring that messages within the same group are processed in order.

When a message with a specific MessageGroupId is being processed and is invisible, no other consumer can process messages from that same group until the visibility timeout expires or the message is deleted.