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According to this answer, it is not possible to determine the size of an individual Amazon EC2 snapshot, but they do provide "the total usage and cost numbers for all snapshots in the account."

Where can I see that total?

Background: I'm trying to determine how encryption affects snapshot size. If I encrypt an EBS volume using dm-crypt, will EC2 still be able to compress it when making a snapshot, and will incremental blocks still help for subsequent snapshots?

The only way I could think to figure this out was to check on the size of snapshots, and since they are not available individually, I would have to check the total, make a snapshot, check the total again, etc. BTW I'm still on the Free Tier so some billing info may be suppressed.

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You should be able to see that information in the Billing Management Console with the Usage Reports for the Elastic Compute Cloud service. I can select "SnapshotUsage" for the different regions in there.

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  • Thanks, but can't find that under Billing > Reports > EC2 Instance Usage Report. Do I need to enable "Receive billing reports" into S3 as described here? – Mark Berry Sep 13 '14 at 16:08
  • Maybe... I'm not sure as I activated nearly all (detailed) billing options to get as much information as possible to generate own reports and create scripts for the data. – Osterjour Sep 14 '14 at 14:05
  • I reviewed this again now that my free trial is over (and it might have worked before). Under Billing and Cost Management > Reports > Amazon Elastic Compute Cloud, I can select Usage Type = "EBS:SnapshotUsage" and download an XML or CSV report. I don't understand why the file is empty even though I have a snapshot? But at least I see the report now. – Mark Berry Jul 3 '15 at 18:55

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