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Difficulty: MediumDesigning Migration Plans and Data Transfer Strategies

A digital media organization needs to migrate 450 TB450\text{ TB} of historical raw video footage from an on-premises Network Attached Storage (NAS) array to a Cloud Storage bucket in Google Cloud. The organization has a dedicated 100 Mbps100\text{ Mbps} internet connection available for cloud operations. Business stakeholders require all video assets to be fully transferred and validated in Google Cloud within 21 days21\text{ days}. Which migration strategy best satisfies these operational requirements?

  1. Order a Google Cloud Transfer Appliance, copy the data locally from the NAS onto the appliance, ship it to Google for ingestion into Cloud Storage, and validate object integrity.Answer
  2. B
    Install Storage Transfer Service on-premises agents on local servers to stream the data directly to Cloud Storage over the internet connection.
  3. C
    Provision a High Availability Cloud VPN tunnel to encrypt and optimize the 100 Mbps100\text{ Mbps} link, then perform a multi-threaded parallel upload using gsutil.
  4. D
    Migrate the raw video assets into a Cloud Spanner database with multi-region replication to accelerate parallel network ingestion.

Answer

Utilize Google Cloud Transfer Appliance to transfer the 450 TB dataset offline, copy the files locally, and ship the physical appliance back to Google for ingestion into Cloud Storage.
Transferring 450 TB450\text{ TB} over a 100 Mbps100\text{ Mbps} internet line requires over 400 days of continuous transfer time. Ordering a Google Cloud Transfer Appliance allows the enterprise to perform high-speed local data capture on-premises, ship the appliance back securely, and ingest the data into Cloud Storage within the required 21-day window.

Step-by-Step Solution

1
Calculate the theoretical minimum network transfer time for online migration.
At 100 Mbps100\text{ Mbps} (12.5 MB/s12.5\text{ MB/s}), transferring 450 TB450\text{ TB} (450,000 GB450,000\text{ GB}) takes 450,000 GB0.0125 GB/s=36,000,000 seconds≈416 days\frac{450,000\text{ GB}}{0.0125\text{ GB/s}} = 36,000,000\text{ seconds} \approx 416\text{ days}.
Online migration over a 100 Mbps connection cannot meet the 21-day deadline.
2
Evaluate GCP data transfer mechanisms for high-capacity offline migration.
Google Cloud Transfer Appliance enables shipping physical high-capacity storage racks to load data locally at multi-Gbps speeds.
Offline transfer bypasses network bandwidth limitations and completes data ingestion within a few business days.
3
Select appropriate storage target for unstructured video files.
Cloud Storage Standard bucket is the cost-effective and architecturally correct destination for large media assets.
Cloud Storage provides scalable object storage optimized for raw video files.

Key Concept

Selecting Data Transfer Services Based on Dataset Size and Available Bandwidth
Estimated Time:1m 30s
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Topics

Designing Migration Plans and Data Transfer Strategies