Thanks for the reply
Why SnapVault works so well is related to the data set, i.e. lots of small files, so traditional methods of backup are not really a workable option
I've looked at MetroCluster, however cost and complicaiton of changing the current solution is a bit of a blocker.
I'm not sure how maintaining two copies of the data set would work if you think through the failover scenarios.
I'm not too familiar with ONTAP Select, how that fit into the solution?