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Difficulty: MediumPlanning Cloud Storage Buckets and Storage Classes

A smart grid utility ingests high-frequency meter telemetry into a Google Cloud Storage bucket. Analytics pipelines continuously process and query this data for the first 30 days. Between day 31 and day 365, data is accessed less than once per quarter for periodic compliance reporting. After 365 days, the data is no longer required and must be removed. Which Object Lifecycle Management configuration minimizes total cost while fulfilling these operational requirements?

  1. Ingest objects into Standard storage, add a lifecycle rule to transition objects to Coldline storage after 30 days, and add a lifecycle rule to delete objects after 365 days.Answer
  2. B
    Ingest objects into Coldline storage immediately, add a lifecycle rule to transition objects to Archive storage after 30 days, and add a lifecycle rule to delete objects after 365 days.
  3. C
    Ingest objects into Standard storage, add a lifecycle rule to transition objects to Archive storage after 30 days, and add a lifecycle rule to delete objects after 365 days.
  4. D
    Ingest objects into Standard storage, add a lifecycle rule to transition objects to Nearline storage after 30 days, with no deletion rule configured.

Answer

Ingest objects into Standard storage, add a lifecycle rule to transition objects to Coldline storage after 30 days, and add a lifecycle rule to delete objects after 365 days.
The correct option correctly pairs Standard storage for initial active queries with Coldline storage for infrequent quarterly compliance reviews starting at day 31, while ensuring cost elimination after 365 days via automated deletion.

Step-by-Step Solution

1
Analyze access frequency for the first 30 days.
Standard storage is appropriate because the data is queried continuously, avoiding retrieval fees associated with colder classes.
Standard storage has higher monthly storage costs per GB but zero retrieval charges, making it optimal for active workloads.
2
Analyze access frequency between day 31 and day 365.
Coldline storage is appropriate because the data is accessed less than once per quarter and meets the 90-day minimum storage duration requirement.
Coldline offers significantly lower storage costs than Nearline and Standard, matching the quarterly access frequency.
3
Determine end-of-life actions after 365 days.
An automated Delete action set for 365 days removes unneeded data.
Explicit deletion prevents ongoing storage fees for data that is no longer required.

Key Concept

Selecting Cloud Storage classes based on access frequency, retention periods, and configuring Object Lifecycle Management rules.
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Topics

Planning Cloud Storage Buckets and Storage Classes

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