Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2005-05-10
2005-05-10
Beausoliel, Robert (Department: 2113)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S019000, C707S793000, C717S170000, C717S171000
Reexamination Certificate
active
06892320
ABSTRACT:
One embodiment of the present invention provides a system that supports multiple versions of highly available objects. A highly available object is a primary object and one or more secondary objects. In an environment supporting multiple versions, the client, the primary, and the secondary objects can each be running either old or new software. Highly available objects introduce a need to process checkpoints where the primary and each of the secondary objects can be at different software versions. In one such situation, the system receives a change to a new version primary object at a node running new version primary software. Next, the system creates a new version checkpoint from this change and distributes the new version checkpoint to nodes executing new version software. The system also translates the new version checkpoint into an old version checkpoint and distributes this old version checkpoint to nodes executing old version software. Note that system can similarly handle an invocation retry where the newly promoted primary object can be an older or newer version.
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McCarthy Christopher
Park Vaughan & Fleming LLP
Sun Microsystems Inc.
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