Does anyone know a simple load balance algorithm (formula) that relates users connected, cpu load, network load and memory usage? This will be used to compare various servers and assign to a new user the best at the moment. Thank You.
+3
A:
If you are using Apache Web Server to proxy the application servers, I recommend that you use mod_proxy and mod_proxy_balancer. You can find a quick introduction about mod_proxy here. This is about Jetty, but it is easily applicable to other servers.
The first thing that you need to worry about clustering is the way sessions are handled. You need to be sure that a request belonging to a session is directed to the same server (or the session is somehow persisted and then always retrieved). Mod_proxy can do this for you.
Regarding the load balancing algorithm, see the documentation of mod_proxy_balancer. According to it, there are 3 load balancer scheduler algorithms.
An older solution to load balancing is mod_jk.
In general, this is not something I would implement myself, even if I had a better algorithm. It is better to use an existing solution.
kgiannakakis
2008-12-11 14:44:03