Type 1, 2 and 3 retry and checkpointing

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United States of America Patent

PATENT NO 5269017
SERIAL NO

07751906

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An improved error recovery system in which all operations which the Central Processor performs are categorized into one of a plurality of recovery types. The determination of category is made based on which architected and machine dependent facilities they manipulate and the manner in which the facilities are manipulated. This classification of instructions into types allows for the amount of checkpoint data to be minimized while allowing recovery to be generalized into broad algorithms instead of handling each operation independently. Furthermore, by applying this classification technique to various phases of execution (recovery windows) of instructions which modify system facilities before they complete, these instructions can also be retried with a minimum of hardware and algorithms.

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Patent Owner(s)

Patent OwnerAddress
INTERNATIONAL BUSINESS MACHINES CORPORTION A CORP OF NYARMONK NY 10504

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hayden, Clifford O Jamaica Plain, MA 6 223
Hurban, Robert J Rye, NY 3 110
McCauley, Donald W Pleasant Valley, NY 17 845
Murdock, Jr John S New Fairfield, CT 5 153
Stillman, Susan B Poughkeepsie, NY 6 216

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