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Difficulty: MediumAmazon S3 Storage Class and Lifecycle Optimization

A company stores media source files in an Amazon S3 Standard bucket. The files are frequently accessed during the first 30 days after upload. Between day 31 and day 90, the files are rarely accessed but must be available for immediate retrieval if requested. After 90 days, the files are rarely accessed and can tolerate a retrieval time of up to 12 hours for compliance auditing.

Which Amazon S3 Lifecycle configuration will meet these requirements most cost-effectively?

  1. Configure a lifecycle rule to transition the objects to S3 Standard-Infrequent Access (Standard-IA) after 30 days, and transition the objects to S3 Glacier Deep Archive after 90 days.Answer
  2. B
    Configure a lifecycle rule to transition the objects to S3 Standard-Infrequent Access (Standard-IA) after 15 days, and transition the objects to S3 Glacier Deep Archive after 90 days.
  3. C
    Configure a lifecycle rule to transition the objects to S3 Standard-Infrequent Access (Standard-IA) after 30 days, and transition the objects to S3 Glacier Deep Archive after 45 days.
  4. D
    Configure a lifecycle rule to transition the objects to S3 Glacier Deep Archive after 30 days, and transition the objects to S3 Standard-Infrequent Access (Standard-IA) after 90 days.

Answer

Configure a lifecycle rule to transition the objects to S3 Standard-Infrequent Access (Standard-IA) after 30 days, and transition the objects to S3 Glacier Deep Archive after 90 days.
The correct configuration transitions objects to S3 Standard-IA after 30 days and then to S3 Glacier Deep Archive after 90 days. This meets the immediate retrieval requirement up to day 90, satisfies the 30-day minimum storage period in S3 Standard before transitioning to S3 Standard-IA, and satisfies the 30-day minimum storage duration for S3 Standard-IA (since objects spend 60 days in Standard-IA before moving to Glacier Deep Archive at day 90). Finally, S3 Glacier Deep Archive offers retrieval within 12 hours, satisfying the compliance retrieval requirement.

Step-by-Step Solution

1
Analyze the access and retrieval requirements for the files over time.
The files require immediate access for 90 days (S3 Standard for 30 days, then a cheaper tier with immediate retrieval like S3 Standard-IA for the next 60 days). After 90 days, retrieval can take up to 12 hours, which allows for S3 Glacier Deep Archive.
This establishes the target storage classes based on access patterns and retrieval time needs.
2
Evaluate S3 Lifecycle transition constraints and minimum storage durations.
Transition from S3 Standard to S3 Standard-IA requires a minimum of 30 days. Transition from S3 Standard-IA to S3 Glacier Deep Archive requires the objects to remain in S3 Standard-IA for at least 30 days.
This ensures the lifecycle policy is valid and does not cause a validation error.
3
Select the policy that conforms to all S3 Lifecycle rules.
Transitioning to S3 Standard-IA at 30 days is valid. Transitioning to S3 Glacier Deep Archive at 90 days means the object spends 60 days in S3 Standard-IA, which is greater than the 30-day minimum limit.
This represents the most cost-effective and valid configuration.

Key Concept

Amazon S3 Lifecycle transition rules and minimum storage duration constraints.
Estimated Time:1m 30s
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Topics

Amazon S3 Storage Class and Lifecycle Optimization

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