GCP Professional Cloud Architect Practice Question

A global media company runs a Dataflow job in the europe-west1 region that repeatedly reads audio files from Cloud Storage, performs feature extraction, and writes several intermediate artifacts that the same job must read again within seconds. All consumers of the final results are other services in europe-west1. The bucket that holds the raw and intermediate data is currently in the multi-region us location, leading to high and unpredictable task latency as well as additional inter-region egress charges. Management insists on keeping the standard 11-nines object durability but does not require cross-continent replication. Which change will most effectively reduce both latency and network egress costs while meeting the durability requirement?

Create a new regional Cloud Storage bucket in europe-west1 and migrate all data and workloads to it.
Switch to a multi-region EU bucket so that replicas stay within Europe while still offering geo-redundancy.
Move the data to a dual-region bucket spanning europe-north1 and europe-west1 so that one replica is near the pipeline.
Retain the current multi-region US bucket but enable Turbo Replication to speed up object propagation.

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Answer Description

Selecting a regional Cloud Storage bucket in europe-west1 co-locates data with the Dataflow workers and downstream services, so read and write paths stay inside the same Google Cloud region. Regional buckets offer the same 11-nines annual durability as multi-region and dual-region locations but avoid the cross-region replication traffic that a multi-region (US or EU) or dual-region configuration introduces. Moving to a dual-region bucket within Europe would still replicate every write to a second region, incurring inter-region egress latency and cost, while maintaining the multi-region US bucket or adding Turbo Replication would continue to place data far from the compute resources. Therefore, a regional europe-west1 bucket provides the lowest latency and eliminates inter-region egress without sacrificing durability.

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