Reply To: AWS Certified Solution Architect Associate preparation S3 Standard question

[KBO]

Hi Carlo,
Check this question

A company plans to use a cloud storage service to temporarily store its log files. The number of files to be stored is still unknown, but it only needs to be kept for 12 hours.

Which of the following is the most cost-effective storage class to use in this scenario?

check the answer in Tutorial dojo for this question.

The scenario requires you to select a cost-effective service that does not have a minimum storage duration since the data will only last for 12 hours. Among the options given, only Amazon S3 Standard has the feature of no minimum storage duration. It is also the most cost-effective storage service because you will only be charged for the last 12 hours, unlike in other storage classes where you will still be charged based on its respective storage duration (e.g. 30 days, 90 days, 180 days).

S3 Standard-IA is designed for long-lived but infrequently accessed data that is retained for months or years. Data that is deleted from S3 Standard-IA within 30 days will still be charged for a full 30 days. S3 Intelligent-Tiering also has a minimum storage duration of 30 days, which means data that is deleted, overwritten, or transitioned to a different S3 Storage class before 30 days will incur the normal usage charge plus a pro-rated charge for the remainder of the 30-day minimum.

S3 Glacier Deep Archive is designed for long-lived but rarely accessed data that is retained for 7-10 years or more. Objects that are archived to S3 Glacier Deep Archive have a minimum of 180 days of storage, and objects deleted before 180 days incur a pro-rated charge equal to the storage charge for the remaining days.

Hence, the correct answer is: Amazon S3 Standard.

Amazon S3 Standard-IA is incorrect because this storage class has a minimum storage duration of at least 30 days. Remember that the scenario requires the data to be kept for 12 hours only.

Amazon S3 Intelligent-Tiering is incorrect. Although this is used for files that have unknown or unpredictable access patterns, just like S3 Standard-IA, this storage class has a minimum storage duration of at least 30 days.

Amazon S3 Glacier Deep Archive is incorrect. Although it is the most cost-effective storage class among all other options, it has a minimum storage duration of at least 180 days which is only suitable for backup and data archival. If you store your data in Glacier Deep Archive for only 12 hours, you will still be charged for the full 180 days.

References:

https://docs.aws.amazon.com/AmazonS3/latest/dev/storage-class-intro.html

https://aws.amazon.com/s3/storage-classes/

Check out this Amazon S3 Cheat Sheet:

Amazon S3

S3 Standard vs S3 Standard-IA vs S3 One Zone-IA Cheat Sheet:

S3 Standard vs S3 Standard-IA vs S3 One Zone-IA vs S3 Intelligent Tiering

• This reply was modified 3 years, 8 months ago by  KBO.