Concurrency management using version identification of shared da

Details Concurrency management using version identification of shared da Concurrency management using version identification of shared da

1993-10-06

1995-04-25

Kriess, Kevin A.

Boots, shoes, and leggings

395600, 364DIG1, 36424341, 36424344, 3642468, 3642281, 3642814, G06F 1516

Patent

active

054106974

ABSTRACT:
A method for managing concurrency using a serializing token as a supplement to locks for accessing the same page by different processes and ensuring coherence between data caches and a shared access backing store supporting the processes defined onto multiple processors. A shared lock and a new token are issued by a local lock manager (LLM) and local cache manager (LCM) in response to a page read request from a process. An exclusive lock, an invalidation of all cache resident copies of the page, a cache write through to backing store of the changed page, a copyback of a new token, and lock release are responsive to a page write/update request from a process where the token issued to the process during a prior request matches the token stored with a cache resident copy of the page. Otherwise, a write request fails and the process must first issue a read request to the page of interest.

REFERENCES:
patent: 3400371 (1968-09-01), Amdahl et al.
patent: 4207609 (1980-06-01), Luiz et al.
patent: 4612612 (1986-09-01), Woffinden et al.
patent: 4716528 (1987-12-01), Crus et al.
patent: 4843542 (1989-06-01), Dashiell et al.
patent: 5060144 (1991-10-01), Sipple et al.
patent: 5210848 (1993-05-01), Liu
patent: 5263155 (1993-11-01), Wang
patent: 5263156 (1993-11-01), Bowen
Lorin and Deitel "Operating Systems", The System Programming Series, copyright 1981 by Addison-Wesley Publishing Co., Chapter 9, re resource management pp. 231-239.
Maekawa et al, "Operating Systems Advanced Concepts", copyright 1987, The Benjamin/Cummings Publishing Co., pp. 187-188.
Bozman et al, US patent application "A Method for Managing a Data Cache Using Virtual External Storage Addresses as Agruments", Ser. No. 07/477,704.
Sakti P. Ghosh, "Data Vase Organization for Data Management", copyright 1977, pp. 33-41.
C. J. Date, "An Introduction to DataBase Systems", 3rd Edition, part 3, re The Hierarchical Approach, copyright 1981, pp. 273-386.
Please refer to co-pending patent application, Ser. No. 07/493,581 for copy of IBM Publication GC28-1150, "MVS/Extended Architecture System Programming Library: System Macros and Facilities", vol. 1.

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