The address of the Couchbase server or servers to which you are connecting.
This value can be set to a hostname or an IP address, like "couchbase-server.com" or "126.96.36.199". It can also be set to an HTTP or HTTPS URL, such as "https://couchbase-server.com" or "http://188.8.131.52". If ConnectionMode is set to Cloud then this should be the hostname of the Couchbase Cloud instance as reported in the control panel.
This value can also accept multiple servers in the above format separated by commas, such as "184.108.40.206, couchbase-server.com". This will allow the driver to recover the connection in case some of the servers listed are inaccessible.
Note that while the driver will try to recover the connection as a whole, it may lose individual operations. For example, while a long-running query will fail if the server becomes inaccesssible while that query is running, that query can be retried on the same connection and the driver will execute it on the next active server.