Practice Test 1 | Google Cloud Certified Professional Data Engineer | Dumps | Mock Test
A company is migrating its current infrastructure from on-premise to Google cloud. It stores over 280TB of data on its on-premise HDFS servers. You were tasked to move data from HDFS to Google Storage in a secure and efficient manner. Which of the following approaches are best to fulfill this task?
A. Install Google Storage gsutil tool on servers and copy the data from HDFS to Google Storage.
B. Use Cloud Data Transfer Service to migrate the data to Google Storage.
C. Import the data from HDFS to BigQuery. Then, export the data to Google Storage in AVRO format.
D. Use Transfer Appliance Service to migrate the data to Google Storage.
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 datacenter. You fill it with data and ship it to an ingest location where the data is uploaded to Google Cloud Storage.
So, answer D is the correct one, while B is incorrect.
Answer A 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.
Answer C is incorrect: In order to migrate to BigQuery, you need to migrate data to Google Storage. This is a useless approach as the main challenge is migrating data from HDFS to Google Storage and BigQuery won’t help solving it.
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
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