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Logic design for dynamic and interactive recovery.Recovery in a fault-tolerant computer means the continuation of system operation with data integrity after an error occurs. This paper delineates two parallel concepts embodied in the hardware and software functions required for recovery; detection, diagnosis, and reconfiguration for hardware, data integrity, checkpointing, and restart for the software. The hardware relies on the recovery variable set, checking circuits, and diagnostics, and the software relies on the recovery information set, audit, and reconstruct routines, to characterize the system state and assist in recovery when required. Of particular utility is a handware unit, the recovery control unit, which serves as an interface between error detection and software recovery programs in the supervisor and provides dynamic interactive recovery.
Document ID
19720027814
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Carter, W. C.
Jessep, D. C.
Wadia, A. B.
Schneider, P. R.
Bouricius, W. G.
(IBM Thomas J. Watson Research Center Yorktown Heights, N.Y., United States)
Date Acquired
August 6, 2013
Publication Date
November 1, 1971
Publication Information
Publication: IEEE Transactions on Computers
Volume: C-20
Subject Category
Computers
Accession Number
72A11480
Funding Number(s)
CONTRACT_GRANT: NAS8-24883
Distribution Limits
Public
Copyright
Other

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