Synchronizing keys across cloned AWS CloudHSM clusters

Client-side and server-side synchronization are only for synchronizing keys within the same AWS CloudHSM cluster. If you copy a backup of a cluster to another region, you can use the syncKey command of the cloudhsm_mgmt_util (CMU) for synchronizing keys between clusters. You might use cloned clusters for cross-region redundancy or to simplify your disaster recovery process. For more information, see syncKey.