in the moment we evaluate the usage of couchbaseserver.
We run into one large show stopper for us. It seems that the ipv6 support in couchbase serveris very bad or missing.
With some changes in the files the server is now running on ipv6. The Webadmin is now behing an http reverse proxy and the replicaton runs only with ipv4 ( RFC198 not routed, we can’t route ipv4 any more).
For me It looks like that there is a very old erlang in use. Newer erlang versions have ipv6 support enabled.
I can’t even find any informations about it in your documentation. We have here ipv6 only networks, no ipv4 available.