CODEWITHSUNDEEP
amazon-web-servicesamazon-s3replicationamazon-glacier
user972014
user972014

Reputation: 3856

Costs of backing up S3 bucket

I have a very large bucket. about 10 million files of 1MB, for a total of 10TB.

Continuously files are added to it (never modified). Let's say 1TB per month.

I backup this bucket to a different one on the same region using a Replication config.

I don't use Galcier for various availabilty and costs considerations.

I'm wondering if I should use Standard access or Infrequent Access storage. As there is a very large amount of files and I'm not sure how the COPY request cost will effect.

What is the difference of costs between the different options? The cost of storage is quite clear, but for copy and other operations, it's not very clear.

Upvotes: 0

Views: 709

Answers (1)

John Rotenstein
John Rotenstein

Reputation: 270224

A good rule-of-thumb is that Infrequent Access and Glacier are only cheaper if the objects are accessed less than once per month.

This is because those storage classes have a charge for data retrieval.

Let's say data is retrieved once per month:

  • Standard = $0.023/GB/month
  • Standard - Infrequent Access = $0.0125/GB/month plus $0.01/GB for retrieval = $0.0225
  • Glacier = $0.004/GB/month plus ~ $0.01/GB = $0.014 -- a good price, but slow to retrieve
  • Glacier Deep Archive = $0.00099/GB/month + $0.02 = $0.021

Therefore, if the backup data is infrequently accessed, (less than once per month) it would be a significant saving to use a different storage class. The Same-Region Replication configuration can automatically change Storage Class when copying the objects.

The Request charges would be insignificant compared to these cost savings.

Upvotes: 2

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