Technique for enabling operation of a computer system with a con

Details Technique for enabling operation of a computer system with a con Technique for enabling operation of a computer system with a con

1982-02-26

1984-07-10

Smith, Jerry

Boots, shoes, and leggings

G06F 1100

Patent

active

044596588

ABSTRACT:
Operation of a computer system after a main memory failure is enabled by storing a read-only access shadow copy of its data structures in another memory having an independent failure mode. The shadow copy is periodically updated at a series of checkpoints. Where the data structure is a linked list, updating without recopying is enabled by prelinking the list item in the read-only list to the beginning of a second read/write list, which is appended to the first list at the next checkpoint.

REFERENCES:
patent: 4044337 (1977-08-01), Hicks et al.
patent: 4075693 (1978-02-01), Fox et al.
patent: 4084231 (1978-04-01), Capozzi et al.
"Physical Integrity in a Large Segmented Database", R. A. Lorie, ACM Transactions on Database Systems, vol. 2, No. 1, Mar. 1977, pp. 91-104.
"Notes on Data Base Operating Systems", J. Gray, Operating Systems--An Advanced Course, 1978, pp. 393-481.
"Recovery Techniques for Database Systems", J. Verhofstad, ACM Computing Surveys, vol. 10, No. 2, Jun. 1978, pp. 165-195.
Experiences with Processes and Monitors in Mesa", R. W. Lampson and D. D. Redell, CACM, vol. 23, No. 2, Feb. 1980, pp. 105-117.

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