On Fri, Jan 11, 2013 at 2:45 PM, Joshua Welker <[log in to unmask]> wrote:

> Reading the Glacier FAQ on Amazon's site, it looks like they provide an
> archive inventory (updated daily) that can be downloaded as JSON. I read
> some users saying that this inventory includes checksum data. So hopefully
> it will just be a matter of comparing the local checksum to the Glacier
> checksum, and that would be easy enough to script.
>
>

One could also occasionally spin up local EC2 instances to do the checksums
in the same data center, and ship just that metadata down - you would not
incur any bulk transfer costs in that case (if memory serves).   DAITSS
uses both md5 and sha1 checksums in combination, other preservation systems
might require similar.

-Randy Fischer