07725559 is referenced by 56 patents and cites 14 patents.

A virtualization infrastructure that allows multiple guest partitions to run within a host hardware partition. The host system is divided into distinct logical or virtual partitions and special infrastructure partitions are implemented to control resource management and to control physical I/O device drivers that are, in turn, used by operating systems in other distinct logical or virtual guest partitions. Host hardware resource management runs as a tracking application in a resource management “ultravisor” partition, while host resource management decisions are performed in a higher level command partition based on policies maintained in a separate operations partition. Host hardware I/O management is implemented in special redundant I/O partitions. Operating systems in other logical or virtual partitions communicate with the I/O partitions via memory channels established by the ultravisor partion.

Title
Virtual data center that allocates and manages system resources across multiple nodes
Application Number
10/575140
Publication Number
7725559 (B2)
Application Date
October 7, 2004
Publication Date
May 25, 2010
Inventor
Aravindh Puthiyaparambil
Phoenixville
PA, US
Rajagopalan Subrahmanian
Phoenixville
PA, US
Terrence V Powderly
East Fallowfield
PA, US
John A Landis
Pipersville
PA, US
Agent
Woodcock Washburn
Richard J Gregson
Assignee
Unisys Corporation
PA, US
IPC
G06F 15/173
G06F 15/16
G06F 15/167
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