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Difficulty: HardPlanning Cloud Storage Buckets and Storage Classes

A global logistics provider is designing a Google Cloud Storage solution for digital freight documentation and bills of lading. The data access profile is as follows:
- High-frequency reads and updates occur during the first 30 days after shipment creation.
- Access drops to infrequent administrative queries (less than once per month) between day 31 and day 90.
- After 90 days, files are rarely accessed but must be retained for 5 years to comply with international trade regulations.
- Regulatory mandates require strict immutability, ensuring files cannot be modified or deleted by any user or administrator during the 5-year retention window.

Which TWO architectural actions should you combine to optimize storage costs while satisfying all compliance requirements? (Select TWO)

  1. Configure an Object Lifecycle Management rule to transition objects from Standard to Nearline storage class after 30 days, and from Nearline to Archive storage class after 90 days.Answer
  2. Define a bucket retention policy of 5 years (1,825 days) and lock the policy using Bucket Lock.Answer
  3. C
    Set the default storage class of the bucket to Archive storage class upon creation to minimize baseline storage costs for all incoming documents.
  4. D
    Apply individual object Access Control Lists (ACLs) removing delete permissions from all accounts on day 90 to satisfy immutability mandates.

Answer

The optimal solution combines using Object Lifecycle Management rules to transition objects from Standard to Nearline at day 30 and to Archive at day 90, alongside defining and locking a 5-year Bucket Lock retention policy on the bucket.
Transitioning objects dynamically from Standard to Nearline after 30 days and to Archive after 90 days minimizes storage costs while preventing high access charges during active processing phases. Locking a 5-year retention policy on the bucket guarantees legal immutability so files cannot be altered or deleted prior to the compliance threshold.

Step-by-Step Solution

1
Analyze access frequency and minimum storage durations across storage classes.
Initial 30 days require Standard storage (frequent updates, no retrieval fees). Days 31-90 suit Nearline (30-day minimum duration satisfied). Beyond 90 days suits Archive (lowest cost for rare retrieval, 365-day minimum duration satisfied).
Aligning data lifecycle transitions with access patterns avoids high data access/retrieval charges while minimizing gigabyte-month storage costs.
2
Evaluate compliance and immutability requirements.
Immutability requires a bucket retention policy locked with Bucket Lock.
Bucket Lock prevents deletion or editing of objects even by Project Owners, ensuring strict regulatory WORM compliance.

Key Concept

Cloud Storage Class Lifecycle Planning and Bucket Lock Retention Policies
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Topics

Planning Cloud Storage Buckets and Storage Classes

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