@"ss888us" Have you tried running dragonfly in docker with more databases than the default 16? do you know how to do that?
Not going to lie I think this method will result in database contamination, like shared Redis servers suffer from.
Unless each container has it's own service provider, this will end in tears I think.
I have found Memcached to be best for WP Sites. I have used Redis, Dragonfly as drop in replacement for redis and memcached. It's supports multi-threading and does not require running multiple instances of redis to make use of more cores. It also has less moving parts. My config file for memcached is 8 lines in total. I think the developer of Dragonfly also admit that memcached is equivalent in terms of performance. Dragonfly main use case is to have redis features + memcached performance. But the question is why we need such complex features for an average WP site?