Flexible temporary capacity upgrade/downgrade in a computer system without involvement of the operating system

摘要

According to the present invention a method and a device is provided for concurrent removal of processor capacity from a running computer. The method and device may, e.g., be used for non-disruptive removal of processors from the enabled physical configuration without any involvement of the operating system. The computer comprises a resource controller being configured to control a physical resource pool including the actual physical resources and a capacity virtualizer being configured to provide multiple sets of virtual resources from a capacity virtualizer resource pool, whereby said provided sets of virtual resources allow to host independent operating systems concurrently. The method comprising the steps of said resource controller requesting said capacity virtualizer to reduce said capacity virtualizer resource pool, said capacity virtualizer removing resources from said capacity virtualizer resource pool, and said resource controller disabling physical resources corresponding to the resources removed from said capacity virtualizer resource pool.