The Xserve can be used for many things , such as a file server and web server . It can even be used for high-performance computing applications using clusteringâ '' a dedicated cluster Xserve , the Xserve Cluster Node . The Xserve can be used for a variety of applications , including file server , web server or even high-performance computing applications using clustering â `` a dedicated cluster Xserve , the Xserve Cluster Node , without a video card and optical drives was also available .