Exam AWS Certified Solutions Architect - Professional topic 1 question 216 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional

Question #: 216
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In Amazon RDS for PostgreSQL, you can provision up to 3TB storage and 30,000 IOPS per database instance. For a workload with 50% writes and 50% reads running on a cr1.8xlarge instance, you can realize over 25,000 IOPS for PostgreSQL. However, by provisioning more than this limit, you may be able to achieve:

A. higher latency and lower throughput.
B. lower latency and higher throughput.
C. higher throughput only.
D. higher latency only.

Show Suggested Answer

Suggested Answer: B 🗳️
You can provision up to 3TB storage and 30,000 IOPS per database instance. For a workload with 50% writes and 50% reads running on a cr1.8xlarge instance, you can realize over 25,000 IOPS for PostgreSQL. However, by provisioning more than this limit, you may be able to achieve lower latency and higher throughput.
Your actual realized IOPS may vary from the amount you provisioned based on your database workload, instance type, and database engine choice.
Reference:
https://aws.amazon.com/rds/postgresql/

by newme at Nov. 30, 2020, 5:50 a.m.

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amministrazione

10 months, 2 weeks ago

C. higher throughput only.

upvoted 1 times

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Sizuma

2 years, 10 months ago

You can provision up to 3TB storage and 30,000 IOPS per database instance. For a workload with 50% writes and 50% reads running on a cr1.8xlarge instance, you can realize over 25,000 IOPS for PostgreSQL. However, by provisioning more than this limit, you may be able to achieve lower latency and higher throughput. Your actual realized IOPS may vary from the amount you provisioned based on your database workload, instance type, and database engine choice. https://aws.amazon.com/rds/postgresql/ B is right

upvoted 1 times

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hansmong

3 years, 5 months ago

Yeah this is obsolete, as of 2019 the max size is 64 TB with 80,000 iops https://aws.amazon.com/about-aws/whats-new/2019/05/amazon-rds-mysql-mariadb-postgresql-64tib-support/

upvoted 1 times

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