Minimum storage duration for “Regional” or “Multi-Regional” GCS buckets

Question

Google cloud storage documentation (https://cloud.google.com/storage/docs/storage-classes) suggests that there is "minimum storage duration" for Nearline (30days) and Coldline (90 days) storage but there is no description about regional and multi-regional storage.

Does it mean that there is absolutely no minimum storage duration? Is the unit by microsecond, second, minute, hour, or a day?

For example, (unrealistically) suppose that I created a google cloud storage bucket, and copied 10 petabyte of the data to the bucket, and removed each piece of data 1 minute after (or moved the data to another bucket I don't have to pay), then, is the cost of regional storage will be

$.02 (per GB per month) * 10,000,000 (GB) * 1/30/24/60 (months) = $4.62 ?

If the "unit" of GCS bucket usage time is an hour rather than a minute, then the cost will be $278. If it is 12 hours, the cost will be $3333, so there are huge differences in such an extreme case.

I want to create a "temporary bucket" that holds petabyte-scale data in a short period of time, and just wanted to know what the budget should be. The previous question (Minimum storage duration Google Cloud Storage buckets) did not help in answering to my question.

Answer 1

There is no minimum storage duration for regional or multi-regional buckets, but keep in mind that you will still have to pay operations costs to upload. At the time of this writing, that would be $0.05 per 10,000 files uploaded.

I believe the granularity of billing is seconds, so your initial calculation $4.62 would be correct. But note depending on the average size of your files, uploading a petabyte is likely to be more expensive than that; if you have a petabyte of files that are 100MB in size, the operations cost for the uploads would be ~$50.