Mechanism for providing virtual machines for use by multiple users
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United States of America Patent
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Jan 14, 2014
Grant Date -
Nov 12, 2009
app pub date -
Jul 23, 2009
filing date -
Sep 10, 1998
priority date (Note) -
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Abstract
According to one aspect of the invention, a request to generate a state checkpoint of a computer is initiated within a user-level software entity, such as a virtual machine. Upon sensing the request, a checkpointing mechanism generates and stores at least one checkpoint, each checkpoint comprising a representation of the total state of the computer system. Upon sensing a state restoration request corresponding to one of the checkpoints, the checkpointing mechanism restores the checkpointed state in the computer, which can then resume operation from the restored total state. According to another aspect of the invention, a total checkpointed state is exported to another computer, where the state can be modified, for example, debugged, and then loaded into either the originally checkpointed computer (which, again, may be a virtual machine), or some other computer.
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