I was testing XDCR 3.0.2 and had a 2 node cluster 2-way XDCR to another 2 node cluster.
I think this may be a single point of failure and is open for a discussion.
2 nodes (Cluster #1)1 A/B <-> (Cluster #2) A/B
Now when I create the XDCR link, the data does catch up during copy, but the limit of XDCR is a single IP address to a destination?
This means a single node in cluster #1 is sending to a single node cluster #2 and vice-versa.
So what happens when any node on either side of XDCR goes down? No we have lost XDCR completely. Is the backup plan requiring a third cluster so that there are 2 paths ultimately to each cluster, the direct path and the indirect thru the non-failed link and intermediate cluster.
Or is there a way to set up XDCR so that any node in cluster #1 will XDCR to any node in cluster #2.
If not, we have a single point of failure on a 2 cluster XDCR.
Your comments appreciated,