Beckermet Chemicals keeps 600 TB of process history in Cloud Storage in europe-west2 and runs its modelling on a cluster in its own data centre, pulling about 80 TB a month across a Dedicated Interconnect. Egress is now the largest single line on the bill. The modelling code is already containerised, each monthly run reads the entire history from scratch, and the results it produces are around 200 GB. Which change reduces cost the most?
- A.
Add a second Dedicated Interconnect circuit so that the monthly transfer completes in less elapsed time.
- B.
Run the modelling containers in europe-west2 and transfer only the 200 GB of results out each month.
- C.
Cache recently read objects on premises so repeated reads do not leave Google Cloud.
- D.
Move the 600 TB to Coldline storage and keep reading it from the data centre.
Show answer
Answer: B
Compute is portable and 600 TB of data is not, so moving the containers next to the data cuts the egress from 80 TB a month to 200 GB.
- A. Interconnect egress is charged per gigabyte transferred, so a second circuit adds fixed cost while moving the same volume.
- B. Relocating portable compute next to immovable data replaces 80 TB of monthly egress with 200 GB, which is the dominant term on the bill.
- C. A cache only helps when objects are read more than once, and the stem states each monthly run reads the entire history from scratch.
- D. Coldline reduces storage price but raises retrieval charges, so data read in full every month costs more, and the egress is unaffected.