International Business Machines Corporation

Globalfoundries Inc.

Transitive Limited

Transitive Limted

Geraint M North

William John Starke

Guy L Guthrie

Naresh Nayar

Phillip G Williams

Hugh Shen

Gregory Richard Hintermeister

Bryan Mark Logan

Simon Murray

Randal Lee Bertram

Paul Brian Tippett

Derek E Williams

Frank Thomas Weigel

Gareth Anthony Knight

Sanjeev Ghai

Hien Le

Steven R Kunkel

ALexander B Brown

John H Sandham

Matthew J Jarvis

Carl Clair Pecinovsky

Alex Brown

Bruce Gerard Mealey

Lee Jason Sanders

Albert James Van Norstrand, Jr

Ian Boden

Brian Chase Twichell

Adam James McNeeney

Gavin Barraclough

Paul Knowles

James Mulcahy

Neil Anthony Campbell

David Sherwood

Gisle Dankel

Jonathan Jay Andrews

Miles Philip Howson

Guy Lynn Gutherie

Graham Woodward

Method and apparatus for handling page protection faults in combination particularly with the dynamic conversion of binary code executable by a one computing platform into binary code executed instead by another computing platform. In one exemplary aspect, a page protection fault handling unit is used to detect memory accesses, to check page protection information relevant to the detected access by examining the contents of a page descriptor store, and to selectively allow the access or pass on page protection fault information in accordance with the page protection information.

Apparatus and method for handling page protection faults in a computing system

A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Tracking modifications to a virtual machine image that occur during backup of the virtual machine

A technique for managing a data network includes monitoring data transfer rates and data transfer thresholds for data transferred between storage and an application. Feedback on the suitability of the data transfer rate is collected from the application. A data transfer threshold for the application is changed based on the monitored data transfer rate and the collected feedback.

Techniques for storage controller quality of service management

Method for flagging data modification during a virtual machine backup

System for flagging data modification during a virtual machine backup

Storage controller quality of service management techniques

Virtual machine backup

Method to display the status of tags applied to objects in a cloud computing environment, by comparing an attribute of an object to a criterion of a tag applied to the object, wherein the object is part of the cloud computing environment, and outputting for display a graphical representation of the tag, wherein the graphical representation comprises a text of the tag and an indication of a result of the comparison.

Enabling a tag to show status

A technique for failure monitoring and recovery of a first application executing on a first virtual machine includes storing machine state information during execution of the first virtual machine at predetermined checkpoints. An error message that includes an application error state at a failure point of the first application is received, by a hypervisor, from the first application. The first virtual machine is stopped in response to the error message. The hypervisor creates a second virtual machine and a second application from the stored machine state information that are copies of the first virtual machine and the first application. The second virtual machine and the second application are configured to execute from a checkpoint preceding the failure point. In response to receipt of a failure interrupt by the second application, one or more recovery processes are initiated in an attempt to avert the failure point.

Managing a check-point based high-availability backup virtual machine

Growing community of inventors

Manchester, United Kingdom

Geraint M North