Exam AWS Certified Solutions Architect - Professional topic 1 question 36 discussion

the question asks to improve the availability EBS volumes are attached to a single ec2 instance correct answer is A

I am trying to understand why option 'A' using S3 cannot be a possible solution for this question. Can some help me on that.

D. EBS with Provisioned IOPS (PIOPS) to store I/O files SQS to distribute elaboration commands to a group of hosts working in parallel Auto Scaling to dynamically size the group ot hosts depending on the length of the SQS queue.

A. S3 to store I/O files. SQS to distribute elaboration commands to a group of hosts working in parallel. Auto scaling to dynamically size the group of hosts depending on the length of the SQS queue. Explanation: S3 for Storage: Using Amazon S3 to store input and output files allows for scalable and durable storage, which can handle a high volume of files efficiently. SQS for Command Distribution: Amazon SQS (Simple Queue Service) can be used to distribute elaboration commands to a group of EC2 hosts working in parallel. This ensures that tasks are processed efficiently and concurrently. Auto Scaling for Dynamic Sizing: Auto Scaling can dynamically adjust the size of the group of EC2 hosts based on the length of the SQS queue. This ensures that the processing capacity scales up or down based on the workload, improving both efficiency and availability.

SNS cannot be used. Between A and D. D is better, EBS is available after Instance restarts. Writing to EBS is faster than S3. S3 in itself is a service written on top of EFS. To improve availability of EBS a better IOPS is needed instead of replacing EBS with S3. Changing the application to use S3 buket.

Question doesn't mention anything about reducing cost. I cannot understand why we would you choose S3 over EBS as quality of service is more important as per question

A: Standard SQS/Auto-Scaling use case. * S3 is cheaper than EBS without provisioning capacity. It is also HA. * SQS decouples the producer and consumer. It is HA. * Auto-scaling for getting needed capacity on-demand (performance and cost)

Answer: A

A. Tricky qn. "S3 to store I/O files." = Increases availability/durability from storing in a single EC2 and EBS. "SQS to distribute elaboration commands to a group of hosts working in parallel" and "Auto scaling to dynamically size the group of hosts depending on the length of the SQS queue" = Increase the compute power and availability to support the processing.

Answer: A Explanation: SNS doesn’t allow you to distribute tasks between group of hosts. It allows you sending notification but how do you decide which host will handle it? Also PIOPS is good for performance but not for availability which this task is asking about. There is no problem in using S3 as there is no frequently changing data, you process the file and write the result once and don’t change it later.

Agree with A. S3 is better.

this is hard going with d simply because "shorten the solution's development time".

A is better because the files in S3 can be read by multiple instances. EBS storage is attached to a single instance

A. With S3 i do a lot to increase availability like cross-region replication etc. Even if you can do multi-attach on EBS Procisioned IOPS io1 it is still limited to 16 and can only be on a single -AZ

a is better

D. Already solution is working with EC2 with EBS volume. Question asking to reduce elaboration time and increase availability. Implementing auto scaling elaboration time will get reduce, with multiple instance in ASG highly available.

A Correct