Message ordering and deduplication (FIFO topics) - Amazon Simple Notification Service
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Message ordering and deduplication (FIFO topics)

You can use Amazon SNS FIFO (first in, first out) topics and Amazon Simple Queue Service (Amazon SQS) FIFO queues together to provide strict message ordering and message deduplication. The FIFO capabilities of each of these services work together to act as a fully managed service to integrate distributed applications that require data consistency in near-real time.