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Difficulty: HardManaging Storage and Database Solutions

An operations engineer manages a Google Cloud Storage bucket named finance-records that has Object Versioning enabled. To comply with corporate retention policies while controlling costs, noncurrent object versions must be transitioned to Archive storage 30 days after becoming noncurrent, and permanently deleted 90 days after becoming noncurrent. Current object versions must remain untouched in Standard storage. Which configuration strategy correctly implements this lifecycle policy?

  1. Define an Object Lifecycle Management policy with two rules: one with action SetStorageClass to ARCHIVE using the daysSinceNoncurrentTime condition set to 30, and another with action Delete using the daysSinceNoncurrentTime condition set to 90.Answer
  2. B
    Define an Object Lifecycle Management policy with two rules using the age condition set to 30 days for SetStorageClass to ARCHIVE and 90 days for Delete.
  3. C
    Schedule a daily gcloud storage objects update job via Cloud Scheduler to modify storage classes to ARCHIVE for objects older than 30 days, followed by a gcloud storage rm command at 90 days.
  4. D
    Enable Uniform Bucket-Level Access on the bucket and attach per-object access control list (ACL) metadata to tag noncurrent versions for automatic storage class transition.

Answer

The lifecycle policy must be configured using the daysSinceNoncurrentTime condition with SetStorageClass to ARCHIVE at 30 days and Delete at 90 days.
Configuring an Object Lifecycle Management rule using daysSinceNoncurrentTime explicitly targets noncurrent object versions created when Object Versioning is active. Setting SetStorageClass to ARCHIVE at 30 days and Delete at 90 days fulfills the exact retention policy without affecting current versions.

Step-by-Step Solution

1
Identify the target objects and lifecycle lifecycle triggers.
The requirement specifies operating strictly on noncurrent object versions generated by Object Versioning without affecting live/current objects.
Standard age conditions evaluate object creation timestamp, whereas daysSinceNoncurrentTime specifically evaluates time elapsed since an object version became noncurrent.
2
Select the lifecycle action for the 30-day requirement.
Action SetStorageClass to ARCHIVE triggered when daysSinceNoncurrentTime equals 30.
This moves noncurrent object versions to lower-cost Archive storage 30 days after replacement.
3
Select the lifecycle action for the 90-day requirement.
Action Delete triggered when daysSinceNoncurrentTime equals 90.
This permanently removes noncurrent versions once they reach the 90-day post-replacement threshold.

Key Concept

Cloud Storage Object Lifecycle Management for Noncurrent Versions
Estimated Time:2m 0s
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Topics

Managing Storage and Database Solutions