You can now use Amazon Simple Queue Service (SQS) First-in, First-out (FIFO) queues in the US East (N. Virginia) region. FIFO queues are designed to ensure that the order in which messages are sent and received is strictly preserved and that each message is processed exactly once. Amazon SQS is a fully managed message queuing service that makes it easy to decouple and scale microservices, distributed systems, and serverless applications. Building applications from individual components that each perform a discrete function improves scalability and reliability. Using SQS, you can send, store, and receive messages between software components at any volume, without losing messages or requiring other services to be always available.