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Difficulty: MediumPlanning Cloud Storage Buckets and Storage Classes

A renewable energy company collects high-frequency sensor telemetry from thousands of wind turbines. The raw telemetry data is continuously written to Google Cloud Storage and queried frequently by operational dashboards for the first 14 days. After 14 days, the data is rarely accessed, but company compliance requires retaining all sensor data for 3 years before deletion. To minimize overall storage and retrieval costs while satisfying operational needs, how should you configure the Cloud Storage bucket?

  1. Set the bucket's default storage class to Standard, and configure an Object Lifecycle Management rule to transition objects to Coldline storage 14 days after creation.Answer
  2. B
    Set the bucket's default storage class to Coldline immediately upon object creation, and configure an Object Lifecycle Management rule to delete objects after 3 years.
  3. C
    Set the bucket's default storage class to Archive immediately upon object creation, and configure an Object Lifecycle Management rule to transition objects to Nearline storage after 14 days.
  4. D
    Set the bucket's default storage class to Standard, and configure an Object Lifecycle Management rule to delete objects 14 days after creation.

Answer

Configure the bucket's default storage class as Standard and use Object Lifecycle Management to transition objects to Coldline storage 14 days after creation.
Starting with Standard storage ensures that frequent queries during the first 14 days do not incur retrieval charges. Setting an Object Lifecycle Management transition to Coldline storage after 14 days minimizes long-term storage costs for data that is rarely accessed, satisfying the 3-year compliance requirement at optimal cost.

Step-by-Step Solution

1
Analyze access frequency during the initial intake period.
The first 14 days require high-frequency access for operational dashboards, making Standard storage the optimal choice because it has no retrieval fees.
Choosing a colder class during active access results in excessive data retrieval charges.
2
Analyze data access and retention requirements after 14 days.
After 14 days, data access drops significantly, but objects must be kept for 3 years. Coldline storage provides a low monthly storage rate for data accessed less than once a month.
Transitioning from Standard to Coldline optimizes monthly storage expenses while meeting the 90-day minimum storage duration requirement of Coldline.
3
Select the automated lifecycle management rule.
Create an Object Lifecycle Management policy with the action 'SetStorageClass' to 'COLDLINE' conditioned on 'Age: 14 days'.
Automating lifecycle transitions prevents manual administrative overhead and ensures cost efficiency.

Key Concept

Selecting Cloud Storage classes and Object Lifecycle Management rules based on data access patterns and retrieval cost considerations.
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Topics

Planning Cloud Storage Buckets and Storage Classes

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