http://www.ibm.com/developerworks/lotus/documentation/dominovmware/?cmp=dw&cpb=dwlot&ct=dwnew&cr=dwnen&ccy=zz&csr=030311Summary: This document presents the results of testing conducted jointly by VMware and IBM to characterize the performance and functionality of IBM Lotus Domino 8.5.1 running on virtual machines using VMware vSphere 4.0. The results of performance testing demonstrate that the latest enhancements in Domino 8.5.1 and VMware vSphere 4.0, combined with the latest x86 server processor technologies, deliver performance that is comparable to a native (non-virtualized) environment. Testing was also performed to validate performance with large mail files, Domino iNotes (HTTP) Server, and Domino clustering.