Hi,

I'm just curious on the following.
Would appreciate some information on how to do it.

Lets Say We have 3 Servers:
Server A - 100mbit Dedicated (Quad Core 2.3)
Server B - 1000mbit Dedicated (2x4x2.0Ghz Xeon)
Server C - 100mbit Small Server or a Good VPS

Website a vBulletin Forum, On Server A, & the MySQL Database for that website is on Server B (as its quite powerful).

Choice of Web servers: Apache, Nginx, Lighttpd
Can use any one of them or a combination.

1) If an image is called, Goto Server B images dir (Like having a image server)
2) If Server A is loaded lets say take's too much time to load, send to Server C (or some similar situation)
3) If Server A is Down site should work from server C.
4) Basically keep the site alive no matter what.

You might be wondering why not put it on Xeon, its a powerhouse..
Yes its possible, but I want to know this, curious and some legal reasons.

Awaiting your replies.

Regards

Server Clustering

Ok thanks.

What options do i have if i want to do it other way ...

There isn't really, clustering is the only real way to provide high availability.


You could use failover switching but that would also require you to implement real time synchronising between the system whereas clustering handles the synching automatically.
Whichever way, it isn't a cheap setup.