How to make a cluster of 4 desktops

Hi I have 4 desktop computers with dual core processors, 500GB disk and 3GB of RAM which I am using as build servers. I would like to create a cluster of these 4 computers so that the开发者_如何学JAVAse four desktop computers act as one server.

I would recommend that you look at continuous integration tools, such as Hudson, which handles distributed builds in a way that seems to be consistent with what you're looking for. Also, even though it is a Java-based framework, it is not limited to Java build tools like ANt or Maven, it also handles shell scripts and native tools like make.