Authors (if Research)
Diwaker Gupta, Marvin McNett, Amin Vahdat, Geoffrey M. Voelker.
Proceedings of the 21st Large Installation Systems Administration Conference. Dallas, TX, Nov 2007
Usher is a virtual machine management system designed to impose few constraints upon the
computing environment under its management. Usher enables administrators to choose how their
virtual machine environment will be configured and the policies under which they will be managed.
The modular design of Usher allows for alternate implementations for authentication, authorization,
infrastructure handling, logging, and virtual machine scheduling. The design philosophy of Usher is
to provide an interface whereby users and administrators can request virtual machine operations
while delegating administrative tasks for these operations to modular plugins. Usher’s implementation
allows for arbitrary action to be taken for nearly any event in the system. Since July 2006, Usher
has been used to manage virtual clusters at two locations under very different settings, demonstrating
the flexibility of Usher to meet different virtual machine management requirements.