Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 207 discussion

NO IDEA

A is correct though I am bit sceptical about Instance Store Volume but as we keeping 3 copies of data we always have options to recover from backup.

A is the answer

". I/O throughput of the servers is the highest priority" , means memory optimized.

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/storage-optimized-instances.html

A because the database duplicates data automatically in order to retain at least three copies of it. Storage optimized instances are designed for workloads that require high, sequential read and write access to very large data sets on local storage. They are optimized to deliver tens of thousands of low-latency, random I/O operations per second (IOPS) to applications.

A seems correct.

rubbish question

A https://aws.amazon.com/ec2/instance-types/?trkCampaign=acq_paid_search_brand&sc_channel=PS&sc_campaign=acquisition_ANZ&sc_publisher=Google&sc_category=Cloud%20Computing&sc_country=ANZ&sc_geo=APAC&sc_outcome=acq&sc_detail=%2Baws%20%2Bec2%20%2Binstance&sc_content={ad%20group}&sc_matchtype=b&sc_segment=536392610626&sc_medium=ACQ-P|PS-GO|Brand|Desktop|SU|Cloud%20Computing|EC2|ANZ|EN|Sitelink&s_kwcid=AL!4422!3!536392610626!b!!g!!%2Baws%20%2Bec2%20%2Binstance&ef_id=CjwKCAiA4veMBhAMEiwAU4XRr1mcJiZPJm2aEg9jzp0URSTnWY7vcTJptsT5Hrw_aOwCag5ncZkHeRoCVcAQAvD_BwE:G:s&s_kwcid=AL!4422!3!536392610626!b!!g!!%2Baws%20%2Bec2%20%2Binstance

A because 'Storage Optimised' instances will give high IOPS for databases. Also, 'instance store' is a temporary storage but it can give IOPS of magnitude 1 million. And we have 3 copies,so lesser risks even if one instance goes down.

Ans: A. Storage optimized instances are designed for workloads that require high, sequential read and write access to very large data sets on local storage. They are optimized to deliver tens of thousands of low-latency, random I/O operations per second (IOPS) to applications.

it's A A. Storage optimized instances with instance store => instance store is good for intensive i/o NOT B. Burstable general purpose instances => it's for CPU usage C. Memory optimized instances with Amazon Elastic Block Store (Amazon EBS) optimization enabled => memory nothing to do with i/o D. Compute optimized instances with Amazon Elastic Block Store (Amazon EBS) optimization enabled => we talk about i/o not about CPU

Passed exam this week and chose A

A is the correct answer as per the documentation under storage optimized instances: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/storage-optimized-instances.html Storage optimized instances are well suited for the following: Data-intensive workloads such as MapReduce and distributed file systems Applications requiring sequential access to large amounts of data on direct-attached instance storage Applications that require high-throughput access to large quantities of data

Lololololololololol

i can't understand why A, we can't store a database only on instance storage, no ?

Answer is A An instance store provides temporary block-level storage for your instance. This storage is located on disks that are physically attached to the host computer. Instance store is ideal for temporary storage of information that changes frequently, such as buffers, caches, scratch data, and other temporary content, or for data that is replicated across a fleet of instances, such as a load-balanced pool of web servers