According to the docs,
Upgrading - NodeBB Documentation
On typical installs of Redis, the main database is found at
and the file actually is there.
So, what is the dump.rdb in the nodebb root dir?
The sso plugin will allow users to log in using the WordPress account.
The blog comments allows users to post replies to content either on the forum. Or in the comments section of your WordPress site. They sync across both.