On Mon, Oct 8, 2012 at 3:50 AM, Jannis Leidel <[email protected]> wrote:

> You're able to ask S3 for the date of last modification, I don't see why a
> comparison by hashing the file content is needed additionally. It'd have to
> download the full file to do that on Django's side and I'm not aware of a
> API for getting a hash from cloudfiles, S3 etc.
>

S3 stores the md5 info in an Etag header.

Regarding Cloudfiles, this is what Rackspace has to say:

You can ensure end-to-end data integrity by including an MD5 checksum of
> your object's data in the ETag header. You are not required to include
> the ETag header, but it is recommended to ensure that the storage system
> successfully stored your object's content.


Dan

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