Ensuring Orderly Delivery of Messages with FIFO AWS SQS Queues
Question
A start-up organization is using FIFO AWS SQS queues for their distributed application.
The developer team is observing messages delivered out of order.
Which of the following can ensure that the orderly delivery of messages?
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D.Correct Answer - B.
Amazon SQS FIFO queues use message group ID for orderly delivery of messages.
Option A is incorrect as Batch ID is an invalid option.
Option C is incorrect as this is used for the deduplication of messages & not for the orderly processing of messages.
Option D is incorrect as the Sequence number is a unique number assigned by AWS SQS & this will not impact the order of messages.
For more information on Amazon SQS, refer to the following URL-
https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/FIFO-queues.htmlThe correct answer is B. Associate the same message group ID with all messages.
Explanation:
Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables you to decouple and scale microservices, distributed systems, and serverless applications. There are two types of SQS queues - standard and FIFO. FIFO (first-in, first-out) queues provide exactly-once processing, and messages are processed in the order that they are sent.
In a FIFO queue, messages are grouped together based on a message group ID. Each message group contains one or more messages, and Amazon SQS ensures that messages within the same message group are delivered to consumers in the order in which they were sent. However, messages in different message groups might be delivered out of order.
To ensure the orderly delivery of messages, the developer team can associate the same message group ID with all messages. This will ensure that all messages are part of the same message group, and Amazon SQS will deliver them in the order in which they were sent.
The other options are incorrect:
A. Associate the same batch ID with all messages: This is not a valid solution as Amazon SQS doesn't provide any such feature to group messages using batch ID.
C. Associate the same message deduplication ID with all messages: This is not a valid solution as message deduplication ID is used to prevent sending duplicate messages within a certain time period.
D. Associate a sequence number with all messages: This is not a valid solution as sequence numbers are assigned by Amazon SQS and are used for tracking purposes only.
