A multinational financial technology institution is migrating its core transaction history… — Google Cloud Professional Cloud Architect

A multinational financial technology institution is migrating its core transaction history and customer records from an on-premises data center to Google Cloud. The dataset consists of $1.8\text{ PB}$ of static compliance audit logs stored on a local NAS and an active $3\text{ TB}$ transactional database running on MySQL. The enterprise has a single dedicated $1\text{ Gbps}$ Cloud Interconnect connection to GCP. The migration schedule dictates that all static data must be transferred within 30 days without impacting daily business traffic, while the database migration allows a maximum downtime cutover window of $4\text{ hours}$ . Which TWO migration strategies should the Lead Cloud Architect recommend to satisfy these operational constraints? (Select two.)

Order Google Cloud Transfer Appliance devices to transfer the $1.8\text{ PB}$ static audit logs offline to Cloud Storage.Answer
Utilize Database Migration Service (DMS) with continuous Change Data Capture (CDC) over the Dedicated Interconnect for the transactional MySQL database prior to final cutover.Answer
C
Deploy Storage Transfer Service agents on-premises to stream the $1.8\text{ PB}$ static audit logs online over the Dedicated Interconnect directly into Cloud Storage.
D
Provision an HA VPN tunnel over the public internet to isolate and stream the database Change Data Capture (CDC) traffic away from the Dedicated Interconnect.

Answer

The architect should order Google Cloud Transfer Appliance devices for the petabyte-scale offline log transfer and use Database Migration Service with continuous Change Data Capture (CDC) over Dedicated Interconnect for the database cutover.

The correct strategy combines offline appliance shipment for large static data and online continuous database synchronization over the private connection. Transferring

1.8\text{ PB}

over a

1\text{ Gbps}

connection is mathematically impossible within 30 days, making offline Transfer Appliance mandatory. For the database, Database Migration Service (DMS) with continuous CDC allows data to sync in the background while production stays online, enabling a quick cutover within the 4-hour downtime limit.

Step-by-Step Solution

Calculate bandwidth throughput for the

1.8\text{ PB}

static dataset.

1\text{ Gbps}

maximum network speed, moving

1.8\text{ PB}

requires

\approx 166\text{ days}

, exceeding the 30-day migration window.

Determines whether an online transfer tool (Storage Transfer Service) or offline device (Transfer Appliance) is required.

Select the appropriate data transfer mechanism for petabyte-scale static data.

Transfer Appliance handles multi-petabyte datasets securely offline within days.

Avoids network link saturation and meets the strict 30-day completion deadline.

Evaluate database size (

3\text{ TB}

) and downtime constraint (

4\text{ hours}

Database Migration Service (DMS) supports continuous CDC synchronization over the existing Dedicated Interconnect.

Allows bulk baseline replication while applications remain operational, keeping cutover downtime well under

4\text{ hours}

Key Concept

Designing hybrid enterprise migration strategies balancing offline appliance bulk transfers against online continuous database replication.

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

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