Figure 4
From: Software platform virtualization in chemistry research and university teaching
Server consolidation: A single powerful computer runs multiple virtual machines and serves as compute server, backup server and web server. Such a setup improves maintenance efficiency and reduces hardware costs. The right picture shows a production server with a XEN Virtual Machine Monitor and 17 independent running systems (Actual VM names were replaced; Picture source: Zhi-Wei Lu; UC Davis Genome Center Bioinformatics Core).