International Business Machines Corporation

Mark P Gardiner

Stephen G Wilkins

Matthew J Kalos

Harry M Yudenfriend

Clint Alan Hardy

Susan Kay Candelaria

William Romney White

Gustav E Sittmann, Iii

Frank William Brice

Harry M Yunderfriend

A computer-implemented method for transferring a reserve to a target host, according to one embodiment, includes granting to a source system, by a control unit, a reserve for a volume of a storage device. A push reserve command is received from the source system. The push reserve command specifies: a transfer of the reserve to a target system, parameter data identifying the target system, and path information specifying the source system. The reserve is transferred only to the target system in response to release of the reserve by the source system.

Methods for transferring reserves when moving virtual machines across systems

According to one embodiment, a host system includes logic adapted for receiving device information from a source system, logic adapted for building a virtual device based at least in part on the received device information, logic adapted for transferring a reserve of a storage device to the host system and/or receiving results of transferring the reserve to the host system, logic adapted for determining if the reserve is held by the host system, logic adapted for recording the reserve if the reserve is held by the host system, and logic adapted for sending a notification that the reserve is not held by the host system if the reserve is not held by the host system. Other systems and computer program products are also described according to various embodiments.

Systems and computer program products for transferring reserves when moving virtual machines across systems

According to one embodiment, a method includes receiving device information from a source system; building a virtual device on a host system based at least in part on the received device information; at least one of: transferring a reserve of a device stored on a storage device to a target system; and receiving results of transferring the reserve to the target system; determining if the reserve is held by the target system; recording the reserve if the reserve is held by the target system; and sending a notification that the reserve is not held by the target system if the reserve is not held by the target system. Other methods are also described according to various embodiments.

A method for changing self-description data of a functional device in a computing system. The method may include virtualizing the functional device to create a virtual functional device, and adding, changing, or removing information in the self-description information sent from a functional device as a part of virtualization of the device by a hypervisor. Changing the self-description data of the functional device occurs after the self-description data has left the functional device.

Growing community of inventors

Albany, NY, United States of America

Mark P Gardiner