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Difficulty: EasyDesigning Migration Plans and Data Transfer Strategies

A media broadcasting company needs to migrate 450 TB450\text{ TB} of static video archives from an on-premises data center to a Cloud Storage bucket in Google Cloud. The company has a single dedicated 1 Gbps1\text{ Gbps} internet connection, and the migration must be completed within 33 days due to a data center facility closure. Which data transfer strategy should the Cloud Architect recommend?

  1. Order a Google Cloud Transfer Appliance, ingest the video data locally, and ship the device to Google for upload into Cloud Storage.Answer
  2. B
    Configure Storage Transfer Service to transfer the video archives directly to Cloud Storage over the existing 1 Gbps internet connection.
  3. C
    Establish an HA VPN tunnel over the internet link to stream the files directly into Cloud Storage using parallel gsutil threads.
  4. D
    Import the static video files into Cloud Spanner tables to enable high-throughput parallel database loading over the network.

Answer

Order a Google Cloud Transfer Appliance, ingest the video data locally, and ship the device to Google for upload into Cloud Storage.
Transferring 450 TB450\text{ TB} over a 1 Gbps1\text{ Gbps} network connection takes approximately 41.6 days under ideal conditions (450,000 GB×8 bits/1 Gbps=3,600,000 seconds450,000\text{ GB} \times 8\text{ bits} / 1\text{ Gbps} = 3,600,000\text{ seconds}). Because the deadline is 3 days, online transfer methods are physically impossible. Ordering a physical Transfer Appliance allows rapid local copying over high-speed local network interfaces and shipping the hardware directly to Google for ingestion into Cloud Storage.

Step-by-Step Solution

1
Calculate required network transfer time for 450 TB over 1 Gbps
Total bits = 450×1012×8=3.6×1015 bits450 \times 10^{12} \times 8 = 3.6 \times 10^{15}\text{ bits}. At 1 Gbps1\text{ Gbps} (109 bits/sec10^9\text{ bits/sec}), duration = 3.6×106 seconds≈41.6 days3.6 \times 10^6\text{ seconds} \approx 41.6\text{ days}.
Evaluating online transfer feasibility against the 3-day deadline constraint.
2
Compare network transfer time to business window
Online transfer (41.6 days) vastly exceeds the required 3-day timeframe.
Determines that an offline physical transfer method is necessary.
3
Select appropriate GCP data transfer service
Google Cloud Transfer Appliance provides high-capacity local ingestion and physical shipment to Google Cloud.
Transfer Appliance is designed specifically for multi-hundred terabyte datasets when network bandwidth is insufficient.

Key Concept

Offline Data Transfer using Transfer Appliance for Large Datasets under Bandwidth and Time Constraints
Estimated Time:1m 0s
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Topics

Designing Migration Plans and Data Transfer Strategies