I am considering implementing MetroCluster across a distance of about 1000km with 15ms latency.
I see within the documentation that less than 700km in distance and less than 10ms of latency are required for MetroCluster. I am wondering is there is still any way to implement this without with my above constraints?
I agree with the above answer. The biggest reason is performance. You didn't give much details but the write latency will severely limit your throughput on writes. We do have a couple other type tools which can help but we don't know your setup or needs.