AWS Import/Export file limits

AWS import/Export can handle volumes of larger then 1TB to be stored on Amazon EBS volumes. However, there is a intermediate step using S3.  If your storage device’s capacity is less than or equal to the maximum Amazon EBS volume size of 1TB, its contents will be loaded directly into an Amazon EBS snapshot. So, in theory no size limit. AWS does not mount the file system on your storage device, nor is a file system required to be present. AWS Import/Export performs a block for block copy from your device to an Amazon EBS Snapshot. If your storage device’s capacity exceeds 1TB, a device image will be stored within your specified Amazon S3 log bucket. You can then create a RAID of EBS volumes using software such as Logical Volume Manager, and copy the image from Amazon S3 to this new volume

RDS cross region snapshots

Great news for AWS RDS users looking to provide extra DR protection to their SQL Server, Oracle and MySQL databases: http://aws.amazon.com/about-aws/whats-new/2013/10/31/announcing-point-and-click-copy-of-amazon-rds-db-snapshots-across-aws-regions/

EBS data transfer costs to snapshot Oracle DB to S3

Obviously, there is a cost to snapshot your EBS volumes of your Oracle database and store them in S3 for backup and recovery.  This is the standard S3 cost of $.095 GB a month.  The cost can go down to $.055 when you store more data.  There is no cost to transfer the data in and out of S3 to and from EC2. 

AWS EBS snapshot volumes for MySQL

This community software solution works to ensure MySQL databases deployed on AWS EBS volumes are keep in sync when snapshots are performed.
https://github.com/alestic/ec2-consistent-snapshot, it flushes OS and some application caches to disk before creating EBS snapshots. It works on most *nix, it will also snapshot arrays of EBS volumes. 

AWS EBS cross region migration

AWS offers the capability to migrate an EBS volume from one region to another.  The feature applies to any application or database data:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-copy-snapshot.html

This can be used to move Oracle database EBS snapshot from one region to another for HA and DR.