To accomplish this, you will setup multiple web-servers and one or more mySQL servers, behind two Rackspace cloud load-balancers. One load-balancer will server all you normal user internet traffic from all the web-servers. The other load-balancer will server only your secured traffic to your admin sites (Dashboard) from a single, master, server. You will then set WordPress to only server the admins sites threw a secure connections, this way all uploads will be saved to a single server and may be distributed from there. This also insures that you will be able to see the newly uploaded file, even before it has a chance to propagate to the other servers. The flaw with this configuration is that if the Master server goes down, no posts may be created until the issue is resolved.
There are meny different ways we can accomplish this. Here I am going to show a two server setup, but you can easily expand this into as many servers as you wish.
- Server1 – Master Database Server, Master Web Server
- Server2 – Slave Database Server, Slave Web Server or only Slave Web Server
Server1 is our main server, if Server2+went down, the site would still be fully up, just slower.
This How-To assumes your using Fedora hosts for these setup’s. To start out, we need Apache, php, mySQL installed on the server.