Comment 35 for bug 1039511

Seems they *always* do charge per request, regardless if moving files from S3 to Glacier or to Glacier directly: http://alestic.com/2012/12/s3-glacier-costs Even if automatic archiving using the S3 rules would be free, copying many small files later out from Glacier can be fraught with considerable fees ( when restoring backup).

So it seems worthwhile to think about minimizing the number of files going to glacier, even if that would mean complications in duplicity source. I think simplest would be adding "rename all files smaller than X with some prefix Y" option, I'll look into it.

At least users should be clearly advised about this pitfall , so that they can take precautions.