This wiki-page lists the policies to allocate and de-allocate machines used for experiments. The basic idea is to have a pool of partially incomplete machines (no memory and disks) and build exactly the configuration needed for the experiment. Then, place the machine in the rack. Note that all machines in the rack are in use and can be removed only by the persons that allocate each of them. The (de)allocate procedure is:
There are two problems remaining: (1) How to deal with new machines and the warranty. (2) How do we ensure that someone does not use an over-qualified? Someone else could needed in the future. One solution is to allocate the minimun quality devices needed.