SQS

• Decouple your architecture

• Standard queues

  • at-least-once message delivery

  • duplicate messages can be delivered

  • best effort ordering

  • Better throughput then FIFO

• FIFO queues

  • exactly-once processing,

  • No Duplicate messages

  • FIFO Order

  • Low throughput

• SQS Temporary Queue Client

  • Request – Response method, short-lived, lightweight messaging destinations

  • No intention to use SQS for long term,

  • leverages virtual queues instead of creating / deleting SQS queues

• Use SQS FIFO for Asynchronously updates to database, avoid dropping writes to the database

• Deduplication of messages can be enabled by

  • Enable content-based deduplication

  • Explicitly provide the message deduplication ID

• Priority: Use separate queues (both can be standard Q) to provide prioritization of work. and EC2 to perform prioritization