Amazon Redshift data sharing allows you to share live, transactionally consistent data across different Redshift clusters without the complexity and delays associated with data copies and data movement. Ability to share data across clusters that are in the same AWS account and across accounts is already available. Now sharing data across Redshift clusters in different AWS regions is available for preview. Cross-region data sharing preview is supported on all Redshift RA3 node types.
Source:: Amazon AWS