A healthcare provider must migrate a 50 TB on-premises MySQL database to Cloud SQL for MySQL using Database Migration Service (DMS). The migration has two non-negotiable requirements:
Continuous data replication is needed to keep cut-over time under 5 minutes.
Patient-data traffic must stay off the public internet and sustain at least 10 Gbps throughput during the bulk-load phase.
Which network connectivity approach best satisfies these constraints while keeping operational overhead low?
Provision a Dedicated Cloud Interconnect to the Google Cloud VPC and configure DMS to use private connectivity over the Interconnect link.
Run DMS over standard internet links using public IP connectivity and protect traffic with SSL/TLS during transit.
Export the database to encrypted dump files, transfer them with Transfer Appliance to Cloud Storage, then import into Cloud SQL after shipment.
Establish an HA Cloud VPN tunnel and configure DMS to use public IP connectivity with source IP allow-listing.
Database Migration Service can run in private connectivity mode, where it reaches Cloud SQL through a VPC-scoped, Google-managed worker. To link the on-premises source network to the VPC without sending traffic over the public internet and while supporting multi-gigabit throughput, Cloud Interconnect is the appropriate option. Dedicated Interconnect provides up to 10 Gbps (or higher with link aggregation), deterministic bandwidth, and does not traverse the public internet. HA VPN or public IP connectivity would cross the public internet and offer lower or variable throughput. Shipping data on a Transfer Appliance or performing an offline import cannot meet the requirement for continuous replication and minimal cut-over time.
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What is Cloud Interconnect, and how does it function?
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What is the role of private connectivity in Database Migration Service (DMS)?
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GCP Professional Data Engineer
Designing data processing systems
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