Optimizing Data Transfer for ETL with Cellular Connections
To speed up data retrieval, more vehicles will be upgraded to cellular connections and be able to transmit data to the ETL process. The current FTP process is error-prone and restarts the data transfer from the start of the file when connections fail, which happens often. You want to improve the reliability of the solution and minimize data transfer time on the cellular connections. What should you do?
Community Votes
75% of anonymous learners picked answer D. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
The core trap is confusing content serving (where Multi-Regional excels) with data ingestion/ETL (where Regional provides better performance characteristics).
This question evaluates the best storage location strategy to minimize latency and maximize reliability for cellular data uploads destined for an ETL process. It establishes that Regional Storage is superior to Multi-Regional Storage for analytics ingestion due to lower latency and higher throughput.
Many learners select C (Multi-Regional) because they associate it with global availability and redundancy, failing to recognize that the scenario prioritizes transfer speed and reliability over immediate multi-region accessibility.
Community Discussion (115 comments)
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Expert Analysis
Why the Answer Is Correct
Option D is correct because the primary goal is to speed up data retrieval and minimize transfer time on cellular connections. According to Google Cloud documentation, Regional buckets offer significantly higher network bandwidth (up to 200 Gbps per region) compared to Multi-Regional buckets (50 Gbps per region). Furthermore, uploading to a single regional bucket reduces the overhead associated with replicating data across multiple geographic regions during the write phase, thereby minimizing latency and improving reliability for the initial upload.Why the Other Options Are Wrong
Options A and B are incorrect because they propose using FTP servers hosted on Container Engine clusters. This introduces unnecessary complexity, management overhead, and potential points of failure compared to directly uploading to Cloud Storage via APIs. Option C is incorrect because while Multi-Regional buckets provide high availability, they incur higher latency during writes due to cross-region replication and have lower aggregate throughput limits per region, which contradicts the requirement to minimize data transfer time.Community Comment Notes
Several community members correctly identified D by referencing official Google Cloud recommendations that distinguish between content serving and analytics use cases. As user n_nana noted, "multi-region is good for content serving and not analytics." User Kulwant85 highlighted the bandwidth difference, stating "Regional: 200 Gbps... Multi-regional: 50 Gbps," which supports the choice for faster transfers. User hems4all also emphasized that Multi-Regional is for external content serving, not internal ETL pipelines.Official Reference
Exam Strategy
Always align your storage choice with the specific workload pattern. For 'ingest and analyze' or ETL workflows where low-latency writes and high throughput are critical, prefer Regional buckets. Reserve Multi-Regional buckets for scenarios requiring low-latency reads from globally distributed users.
Frequently Asked Questions
Why not use Multi-Regional buckets for higher availability?
While Multi-Regional offers higher availability, it has lower write throughput limits and higher write latency due to cross-region replication. For ETL ingestion, speed and reliability of the initial upload are prioritized, making Regional buckets the better fit.
Is FTP ever recommended for cloud data ingestion?
No. Directly uploading to Cloud Storage via HTTPS APIs is more secure, scalable, and reliable than hosting custom FTP servers on VMs, which adds management overhead and potential single points of failure.
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