Abstract: Desktop cloud is a pattern of desktop usage, provides the remote desktop services. Desktop cloud middleware is one of the key components of the desktop cloud of leveraging infrastructure resources, improving the user experience and the system robustness. In order to meet the dynamic needs of desktop cloud, this paper proposes a middleware-based desktop cloud grid structure, details the function and designing elements of middleware. Scheduling algorithm based on dynamic feedback mechanism and the virtual desktop dynamic allocation algorithm are proposed. With the multiple node tests, the rationality and validity of the algorithms and the grid structure are proved.

Key words: grid； virtual desktop, remote, services