Picking a way to move existing data into Google Cloud

Google Cloud offers multiple data transfer tools depending on data source, volume, and network constraints, and the exam expects you to match the right tool to the right scenario. Storage Transfer Service handles online transfers from other cloud providers, on-premises HTTP/S sources, and between Cloud Storage buckets, while Transfer Appliance is a physical device for offline transfer of very large on-premises datasets. Choosing correctly hinges on data size, source/destination type, network bandwidth, and whether the transfer needs to be recurring or one-time.

1 · Learn the must-know

• 1Storage Transfer Service is used for large-scale online transfers from AWS S3, Azure Blob Storage, on-premises HTTP/S/POSIX sources, and Cloud Storage-to-Cloud Storage moves, and supports scheduled/recurring syncs.
• 2Transfer Appliance is a physical, ruggedized storage device shipped to your site for offline transfer of very large datasets (typically 100TB+) when network bandwidth is insufficient or transfer time over the network would be impractical.
• 3gcloud storage or gsutil (the CLI tools) are appropriate for smaller, ad hoc, one-time transfers where the data volume and time constraints don't justify a managed transfer service.
• 4Storage Transfer Service for on-premises data requires installing a transfer agent on-premises to facilitate the online transfer.
• 5The choice depends on network bandwidth versus data size: if the estimated online transfer time is too long or costly given available bandwidth, Transfer Appliance is the better choice.
• 6Storage Transfer Service is fully managed, offers built-in scheduling, filtering, and retry logic, making it preferable over manual CLI-based copying for large or recurring migrations.

2 · Check your understanding