I'd like to populate the Expires tag on all of my existing files.  I know you can do a resync, which deletes everything and re-adds it, but I'd rather just update the files in-place to avoid any downtime.  Is it possible with s3sync?  Or is it an easy change to make to the script?

Another option would be to have s3sync overwrite all existing files...essentially resync without the delete.

Thanks,
Robbie
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