A build is normally a fairly sequential process, and in a big project, a full execution can easily take hours. While one could bring such a job on Hudson, a long turn-around time to the result tends to reduce the value of continuous integration. This page discusses a technique to cope with this problem.
The idea to is to split a big build into multiple stages. Each stage is executed sequentially for a particular build run, but this works like a CPU pipeline and increase the throughput of CI, and also reduces the turn-around time by reducing the time a build sits in the build queue.
In this situation, your earlier stage needs to pass files to later stages. A general way to do this is as follows:
If you have more than 2 stages, you can repeat this process. In some cases, this "zip/tgz" file would have to contain the entire workspace. If so, the next stage can use the URL SCM plugin to simplify the retrieval.
Note: there is a new plugin which helps with this problem: http://wiki.hudson-ci.org/display/HUDSON/Clone+Workspace+SCM+Plugin