Exam AWS Certified Database - Specialty topic 1 question 58 discussion

Keywords here are "without significant development efforts". DAX is the answer. D

D. Use DynamoDB Accelerator to offload the reads https://docs.amazonaws.cn/en_us/amazondynamodb/latest/developerguide/DAX.html

D is the correct answer. Per AWS document - https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/V2globaltables_HowItWorks.html For read-heavy or bursty workloads, DAX provides increased throughput and potential operational cost savings by reducing the need to overprovision read capacity units. This is especially beneficial for applications that require repeated reads for individual keys.

Option D : https://docs.amazonaws.cn/en_us/amazondynamodb/latest/developerguide/DAX.html "Applications that are read-intensive, but are also cost-sensitive. With DynamoDB, you provision the number of reads per second that your application requires. If read activity increases, you can increase your tables' provisioned read throughput (at an additional cost). Or, you can offload the activity from your application to a DAX cluster, and reduce the number of read capacity units that you need to purchase otherwise."

large number of repeated GetItem methods => DAX

D is the answer since they don't want developments

Option D. Service cost is not a concern but development cost is.

The problem is various repeated operations, a in memory DB like DAX is the best aproach.

D is the easiest option

Ans: D

We need caching solution to offload reads and reduce the cost. DAX is the best caching solution for DynamoDB API calls

yes it is D

D here, but DAX is not cost effective way

B was never in play for me. Redshift is not cheap and that's not what they're asking. I'm surprised nobody picked C, textbook case for Caching

Q, The company wants to control these costs Answer B. I this to using Redshift and kinesis will increase the cost a lot compare to just using DAX. So the answer is D

I think D as well. Dax helps with read intensiveness and cost effectiveness "without significant development efforts". https://docs.amazonaws.cn/en_us/amazondynamodb/latest/developerguide/DAX.html "Applications that are read-intensive, but are also cost-sensitive. With DynamoDB, you provision the number of reads per second that your application requires. If read activity increases, you can increase your tables' provisioned read throughput (at an additional cost). Or, you can offload the activity from your application to a DAX cluster, and reduce the number of read capacity units that you need to purchase otherwise."

D here