@ChristineCooper The faster your web server is the less you need "clustering". You can go a long way by just getting stronger servers. "Clustering" becomes realy needed when you can't afford losing any traffic and need to be able to switch between server while upgrading the other, but once you start thinking this way you very quickly decide to always have two with a load balancer in front of them

The main problem with clusteering is that you need to start thinking like a devsop, something that wordpress always tries to prevent you from doing. This means that like tom has hinted you need to decide if cron and admin can run on all servers or not, but also how do you deploy code changes, how you handle static resources etc.

whatever other people say, it is better to try and avoid clustering as long as you can

cron should not run on multiple servers, in the past this has lead to duplicate cron job running issues

ideally WP Admin and cron jobs are on their own server, and managed rather than relying on WP Cron, either via a system cron job, or something like cavalcade

What do you think about this? meta.stackexchange.com/questions/369568/…

Hmm. That's a tough one. There was another meta ticket talking about answer tags to assign things like version and such. I think for our site, and for most technical sites, checkmark would be the gold standard.

But if answer tags were to be implemented then I could see getting away from answer checkmarks as versioned answers would become more relevant.