Rsync to Amazon S3
http://www.s3rsync.com/index.php/Rsync_to_Amazon_S3
The problem:
S3 storage protocol is “all or nothing” meaning that you can not modify a file on S3 and even for a minor change you have to upload (S3 PUT) the whole file again. This implies that backup and synchronization to S3 are inefficient. Any file modification forces you to upload the whole new file again, not just what was changed. So you are wasting bandwidth and the backup process is significantly slower!
Our solution:
S3rsync resolves this limitation and allows you to use Rsync bandwidth efficient algorithm that enables to upload only partial files that were changed. This is done by connecting to our Rsync servers located inside Amazon facility (Ec2). Using this functionality enables you to fully benefit from Rsync power.
