Device Manager Having Authoritative Process Relations For Conforming State Data Upon Failover
First Claim
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1. A method comprising:
- detecting a failure in an active first instance of a computer-executable manager of and for a device; and
activating processes of a second instance of said manager so that at least a conforming first process of said second instance conforms to state data of an authoritative second process of said second instance.
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Abstract
A device has first and second instances of a computer-executable manager. When a failure is detected in the first instance while it is active, the second instance is activated. During activation of the second instance, a conforming first process of the second instance conforms its state data to an authoritative second process of the second instance.
12 Citations
20 Claims
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1. A method comprising:
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detecting a failure in an active first instance of a computer-executable manager of and for a device; and activating processes of a second instance of said manager so that at least a conforming first process of said second instance conforms to state data of an authoritative second process of said second instance. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device comprising:
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configurable hardware; first and second instances of a computer-executable manager for said hardware, each of said instances supporting plural processes for manipulating state data for said hardware, each of said instances being able to assume an active mode and a tracking standby mode whereby an instance in said active mode interacts with external devices and an active instance in said tracking standby mode tracks the state data of said instance in said active mode, the processes in a instance in said active mode having consistency rules that apply when said instance is in a steady state, each of said instances modifying tracked data to conform to said consistency rules when transitioning from said tracking standby mode to said active mode. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. Computer-readable media comprising a program of computer-executable instructions providing for:
a device manager providing for a first process and a second process, said device manager providing for an active mode and a tracking standby mode, said device manager while in said active mode alternating between steady states and transitional states during which said device manager responds to external events, said first and second processes modifying respective first and second sets of data so that that they conform to consistency rules while said device manager is in said steady states, said device manager while in said tracking standby mode conforming said first and second sets of data with data of an active second instance of said device manager, said device manager modifying said first set of data at least in part as a function of said second set of data to conform to said consistency rules while transitioning from said tracking standby mode to said active mode. - View Dependent Claims (16, 17, 18, 19, 20)
Specification