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Zorluk: Çok zorPlanning Cloud Storage Buckets and Storage Classes

An organization processes large genomic data files in Google Cloud Storage. The application architecture demands the following data access and lifecycle requirements:

1. Data is ingested and accessed heavily for immediate analytics during the first 30 days.
2. Between 30 days and 120 days, data access decreases to occasional monthly auditing.
3. After 120 days, data is rarely accessed (less than once per year) but must be retained for 5 years to meet regulatory compliance.
4. The solution must strictly prevent early transition or early deletion charges caused by violating Cloud Storage tier minimum storage duration policies (Nearline: 30 days, Coldline: 90 days, Archive: 365 days).

Which bucket default storage class and Object Lifecycle Management configuration achieves the lowest overall cost while satisfying all constraints without incurring minimum duration penalty fees?

  1. Set the default storage class to Standard. Create a lifecycle rule to transition objects to Nearline storage after 30 days of age, and a second rule to transition objects to Archive storage after 120 days of age.Cevap
  2. B
    Set the default storage class to Standard. Create a lifecycle rule to transition objects directly to Coldline storage after 30 days of age, and a second rule to transition objects to Archive storage after 60 days of age.
  3. C
    Set the default storage class to Coldline. Create a lifecycle rule to transition objects to Nearline storage after 30 days of age, and a second rule to transition objects to Archive storage after 120 days of age.
  4. D
    Set the default storage class to Standard. Create a lifecycle rule to transition objects to Nearline storage after 15 days of age, to Coldline storage after 30 days of age, and to Archive storage after 120 days of age.

Cevap

The optimal strategy is setting the default bucket storage class to Standard, transitioning objects to Nearline storage after 30 days of age, and subsequently transitioning objects to Archive storage after 120 days of age.
The correct strategy starts with Standard storage for high-frequency access during the first 30 days. Transitioning to Nearline at 30 days provides cost savings for monthly audit access. Transitioning to Archive at 120 days reduces long-term retention costs for 5 years. Because objects stay in Nearline for 90 days (from day 30 to day 120), the 30-day minimum storage duration of Nearline is satisfied, avoiding any early transition penalties.

Adım Adım Çözüm

1
Analyze the access pattern for the initial 30 days.
Heavy access during the first 30 days requires Standard storage to avoid data access and retrieval fees.
Coldline, Nearline, and Archive classes charge retrieval fees per GB, making them unsuitable for active analytics.
2
Evaluate storage class minimum durations against transition schedules.
Nearline storage requires a minimum duration of 30 days, Coldline requires 90 days, and Archive requires 365 days.
Transitioning or deleting an object before its tier's minimum storage duration incurs early deletion/transition charges equal to the remaining duration.
3
Validate the timeline for Nearline to Archive transition.
Objects reside in Nearline from day 30 to day 120 (a total of 90 days).
Since 90 days exceeds Nearline's 30-day minimum duration requirement, moving objects to Archive at day 120 incurs zero early transition penalties.

Anahtar Kavram

Cloud Storage Class Minimum Duration & Lifecycle Transition Optimization
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