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Difficulty: HardPlanning Cloud Storage Buckets and Storage Classes

A medical research firm is planning a Google Cloud Storage solution for raw genomic sequencing data. Newly uploaded datasets are heavily processed and read multiple times daily during the first 30 days. After 30 days, processing completes and datasets are accessed less than once a year for compliance audits, but must remain available with millisecond retrieval SLA times. To optimize total cost of ownership while adhering to storage class minimum duration rules, which TWO lifecycle management and storage class strategies should the team implement? (Select TWO.)

  1. Set the default bucket storage class to Standard Storage to handle initial active data processing.Answer
  2. Configure an Object Lifecycle Management rule to transition objects to Archive Storage 30 days after creation.Answer
  3. C
    Configure an Object Lifecycle Management rule to transition objects from Standard to Coldline Storage at 10 days, and then to Archive Storage at 30 days.
  4. D
    Set the default bucket storage class to Nearline Storage from ingest to reduce storage charges during the first 30 days.

Answer

The team should set the default storage class to Standard Storage for the initial active processing phase and configure an Object Lifecycle Management rule to transition objects to Archive Storage after 30 days.
The correct strategy combines Standard Storage for the initial active 30-day window (preventing retrieval fee penalties during frequent reads) with a direct Object Lifecycle Management rule transition to Archive Storage at 30 days (maximizing monthly storage savings for data read less than once per year while maintaining millisecond access time).

Step-by-Step Solution

1
Analyze access frequency and patterns for the first 30 days.
Data is accessed multiple times per day. Standard Storage is required to avoid per-GB retrieval fees during active processing.
Coldline, Nearline, and Archive classes charge retrieval fees for data access, which makes them expensive for active daily workloads.
2
Analyze access frequency and latency requirements after day 30.
Access is less than once a year, requiring long-term archiving with millisecond retrieval SLA.
Archive Storage provides sub-second retrieval latency at the lowest monthly storage cost among Google Cloud Storage classes.
3
Evaluate intermediate transitions against minimum storage duration rules.
Transitioning directly from Standard to Archive at 30 days avoids intermediate minimum duration penalties.
Coldline has a 90-day minimum storage duration penalty; moving data from Coldline to Archive after 20 days would incur early transition charges.

Key Concept

Cloud Storage Class Selection & Lifecycle Minimum Storage Duration Penalties
Estimated Time:2m 0s
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Topics

Planning Cloud Storage Buckets and Storage Classes

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