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Difficulty: HardPlanning Cloud Storage Buckets and Storage Classes

A satellite remote-sensing analytics organization ingests radar dataset files into a Google Cloud Storage bucket. The operations team outlines the following access pattern and compliance lifecycle for the data:

• For the first 1414 days after ingestion, dataset files undergo intense processing and are accessed multiple times per day by automated analytical workloads.
• Between day 1515 and day 9090, dataset files are queried sporadically (approximately once every 3030 days) for custom customer reporting.
• After 9090 days, the datasets are accessed less than once per year but must be retained for 77 years to meet regulatory compliance requirements.

Which Cloud Storage bucket lifecycle strategy minimizes the total cost of ownership (TCO) while adhering to storage class minimum duration rules and retrieval cost considerations?

  1. Set the default bucket class to Standard. Add Object Lifecycle Management rules to transition objects to Nearline storage after 1414 days, and transition objects to Archive storage after 9090 days.Answer
  2. B
    Set the default bucket class to Coldline. Keep all data in Coldline storage for the entire 77-year retention period to avoid lifecycle transition overhead.
  3. C
    Set the default bucket class to Standard. Add Object Lifecycle Management rules to transition objects to Coldline storage after 1414 days, and transition objects to Archive storage after 3030 days.
  4. D
    Set the default bucket class to Archive. Perform all initial 1414-day processing using direct reads to minimize long-term storage unit costs.

Answer

Configure a bucket with the Standard storage class, transitioning objects to Nearline storage after 14 days and to Archive storage after 90 days using Object Lifecycle Management.
The correct strategy starts with the Standard storage class for active processing during the first 14 days to prevent retrieval charges. Moving data to Nearline after 14 days aligns with the monthly access pattern and respects Nearline's 30-day minimum storage requirement. Finally, transitioning data to Archive after 90 days minimizes long-term retention cost for 7 years while satisfying Archive's 365-day minimum storage commitment.

Step-by-Step Solution

1
Analyze initial ingestion access requirements (Days 0-14).
Identified high-frequency daily read access pattern.
Standard storage class has no retrieval fees per GB or retrieval operation charges, making it optimal for active processing.
2
Evaluate intermediate storage requirements (Days 15-90).
Selected Nearline storage class at Day 14 transition.
Nearline is intended for data accessed less than once a month with a 30-day minimum storage duration requirement. Staying in Nearline from day 14 to day 90 (76 days) satisfies the 30-day minimum duration requirement without incurring early deletion penalties.
3
Evaluate long-term compliance archiving requirements (Day 91+ to 7 years).
Selected Archive storage class at Day 90 transition.
Archive storage class offers the lowest per-gigabyte storage pricing for data accessed less than once per year, and retaining objects for 7 years easily fulfills Archive's 365-day minimum storage duration threshold.

Key Concept

Cloud Storage Class Selection & Lifecycle Transition Rules
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Topics

Planning Cloud Storage Buckets and Storage Classes

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