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Difficulty: HardAmazon S3 Storage Class and Lifecycle Optimization

An enterprise database backup system uploads transaction logs to an Amazon S3 Standard bucket. The logs must be managed under the following requirements:

- Logs must be available for immediate, frequent access for the first 3030 days.
- Between day 3030 and day 6060, logs are accessed occasionally but must retain millisecond retrieval times.
- After 6060 days, logs are rarely accessed, and retrieval times of up to 55 hours are acceptable for compliance audits.
- The logs must be kept for a total of 365365 days and then permanently deleted.

A SysOps administrator is configuring an S3 Lifecycle policy to automate these transitions while minimizing costs and preventing validation or early transition errors. Which TWO configuration actions should the administrator specify in the lifecycle rule?

  1. A transition action to move objects from the S3 Standard storage class to the S3 Standard-Infrequent Access (Standard-IA) storage class after 3030 days.Answer
  2. A transition action to move objects from the S3 Standard-Infrequent Access (Standard-IA) storage class to the S3 Glacier Flexible Retrieval storage class after 6060 days.Answer
  3. C
    A transition action to move objects from the S3 Standard-Infrequent Access (Standard-IA) storage class to the S3 Glacier Deep Archive storage class after 4545 days.
  4. D
    A transition action to move objects from the S3 Glacier Flexible Retrieval storage class to the S3 Standard-Infrequent Access (Standard-IA) storage class after 9090 days.
  5. E
    A transition action to move objects from the S3 Standard storage class to the S3 Glacier Flexible Retrieval storage class after 3030 days.

Answer

A transition action to move objects from the S3 Standard storage class to the S3 Standard-Infrequent Access (Standard-IA) storage class after 3030 days, and a transition action to move objects from the S3 Standard-Infrequent Access (Standard-IA) storage class to the S3 Glacier Flexible Retrieval storage class after 6060 days.
The correct options specify transitioning objects from S3 Standard to S3 Standard-IA after 3030 days, followed by transitioning from S3 Standard-IA to S3 Glacier Flexible Retrieval after 6060 days. This aligns with the access requirements (millisecond retrieval between days 3030 and 6060, and up to 55-hour retrieval after day 6060) and satisfies the S3 Lifecycle API validation constraint requiring a minimum of 3030 days of storage in S3 Standard-IA before transitioning to S3 Glacier classes (60−30=3060 - 30 = 30 days).

Step-by-Step Solution

1
Map the storage class requirements to the timeline.
Days 00-3030 require immediate access (S3 Standard). Days 3030-6060 require occasional access with millisecond retrieval times (S3 Standard-IA). Days 6060-365365 require rare access with up to 55-hour retrieval times (S3 Glacier Flexible Retrieval). Day 365365 requires permanent deletion.
This establishes the target storage classes based on access frequency, retrieval performance, and retention rules.
2
Evaluate S3 Lifecycle transition sequence validation constraints.
The transition from S3 Standard to S3 Standard-IA occurs at day 3030. The next transition from S3 Standard-IA to S3 Glacier Flexible Retrieval must be configured such that objects spend at least 3030 days in S3 Standard-IA. Therefore, the transition to S3 Glacier Flexible Retrieval must occur at day 6060 or later (30+30=6030 + 30 = 60).
S3 Lifecycle policies will fail API validation if a transition from Standard-IA to a Glacier class is scheduled for fewer than 3030 days after the transition to Standard-IA.
3
Validate transition direction rules.
Ensure all transitions flow from warmer to colder classes (Standard to Standard-IA, and Standard-IA to Glacier).
S3 Lifecycle rules do not support moving objects back to warmer classes (e.g., Glacier to Standard-IA).

Key Concept

Amazon S3 Lifecycle transition rules and minimum storage class duration validation constraints.
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Topics

Amazon S3 Storage Class and Lifecycle Optimization

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