TRANSITIONING OF VIRTUAL MACHINE FROM REPLAY MODE TO LIVE MODE

A backup VM is allowed to enter live execution mode at instruction boundaries but not in the middle of emulation of a single instruction. This is accomplished by having the last log entry of multiple entries generated during emulation of an instruction to have an indication of a "go-live"...

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Bibliographic Details
Main Authors VENKITACHALAM GANESH, SCALES DANIEL J, NELSON MICHAEL
Format Patent
LanguageEnglish
Published 07.05.2009
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:A backup VM is allowed to enter live execution mode at instruction boundaries but not in the middle of emulation of a single instruction. This is accomplished by having the last log entry of multiple entries generated during emulation of an instruction to have an indication of a "go-live" point and by having the backup VM not replay log entries provided by the primary VM beyond the log entry that indicates the "go-live" point.
Bibliography:Application Number: US20080266171