Practice Test 3 | Google Cloud Certified Professional Data Engineer | Dumps | Mock Test

Question 17

A startup web-hosting company is using its on-premise servers to host websites and web applications for their clients. The company offers two plans: Free tier and premium tier. The free tier allows clients to host for one year for free with hosting storage up to 50GB. As the startup grows and gains more clients, it was harder to manage more on-premise servers and disks, so the founders decided to move their existing stack to the cloud.

Choosing Google Cloud, one of the challenges required is moving over 100TB of hosting content to Google Storage. The existing network bandwidth can be dedicated to uploading data is approximately 20mb/s. What is the best approach for this?

A. Use Cloud Data Transfer Service to migrate the data to Google Storage.
B. Install gsutil command tool on servers and copy the data from on-premise disks to Google Storage.
C. Move on-premise data to HDFS. Launch a Dataproc cluster with 20 worker nodes. Write a script for Dataproc to read from on-premise HDFS and write to Google Storage using a connector.
D. Use Transfer Appliance Service to migrate the data to Google Storage.

Answer

Correct Answer: D

Storage Transfer Service allows you to quickly import ONLINE data into Cloud Storage. You can also set up a repeating schedule for transferring data, as well as transfer data within Cloud Storage, from one bucket to another.

Transfer Appliance is an OFFLINE, secure, high capacity storage server that you set up in your data center. You fill it with data and ship it to an ingest location where the data is uploaded to Google Cloud Storage.

So, option D is the correct one, while option A is incorrect.

Option B is incorrect: gsutil tool is good for programmatic usage by developers and may be useful to copy and move megabytes/gigabytes of data; not so practical for Terabytes of data. It’s also not reliable data transfer technique as it is related to the machine’s connectivity with Google Cloud.

Option C is incorrect: Using Dataproc is not straightforward because data needs to be moved to HDFS and, based on the scenario, files are not optimized for HDFS ecosystem.

Source(s):

Google Cloud Storage Transfer Service:

https://cloud.google.com/storage-transfer/docs/

Google Appliance Transfer Service:

https://cloud.google.com/transfer-appliance/

Migrate HDFS to Google Storage: https://cloud.google.com/solutions/migration/hadoop/hadoop-gcp- migration-data