1. What are FIFO topics in Amazon SNS?
Answer: FIFO topics in Amazon SNS are those topics that provide strict message ordering and deduplication of messages. These topics ensure that the order in which messages are sent is the same order in which they are received by the subscribers.
2. Why is message ordering important in FIFO topics?
Answer: Message ordering is important in FIFO topics because it ensures that the messages are processed in the order they were sent. This is particularly important for applications that require strict ordering of messages, such as financial applications or stock trading systems.
3. How does Amazon SNS ensure message deduplication in FIFO topics?
Answer: Amazon SNS ensures message deduplication in FIFO topics by assigning a unique message deduplication ID to each message. This ID is used to identify and discard duplicate messages before they are delivered to subscribers.
4. Can non-FIFO topics provide message ordering and deduplication?
Answer: No, non-FIFO topics in Amazon SNS do not provide message ordering and deduplication. Only FIFO topics provide strict message ordering and deduplication of messages.
5. What is the difference between message grouping and message filtering in FIFO topics?
Answer: Message grouping is a feature of FIFO topics that allows messages to be grouped together based on a common attribute. This ensures that messages with the same attribute value are processed in the order they were sent. Message filtering, on the other hand, allows subscribers to filter messages based on a set of attributes. This ensures that subscribers only receive messages that match their filtering criteria.