Electrical computers and digital processing systems: memory – Storage accessing and control – Shared memory area
Reexamination Certificate
2005-11-22
2005-11-22
Peikari, B. James (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Shared memory area
C711S112000, C711S150000, C707S793000
Reexamination Certificate
active
06968432
ABSTRACT:
A system, computer usable medium and computer-based method for altering a sequence number assignment pattern while preserving integrity and high concurrency in an environment having a plurality of applications on at least one computer system sharing a direct access storage device (DASD). The method generates and assigns sequence numbers for a shared sequence object located on the shared DASD to a plurality of applications executing concurrently and using the shared sequence object. When an application starts altering the shared sequence object attribute(s) during concurrent assignment of sequence numbers by other applications, it notifies all computer systems using the shared sequence object to locally refresh the sequence object attribute descriptor and discard unused reserved sequence numbers, and then updates the altered shared sequence object attribute and last assigned sequence number on the shared DASD.
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Croisettier RamanaKumari M.
Josten Jeffrey William
Choi Woo H.
Parker Esq. Sandra M.
Peikari B. James
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