Intersystem data base sharing journal merge method

Details Intersystem data base sharing journal merge method Intersystem data base sharing journal merge method

1990-09-06

1992-09-29

Kriess, Kevin A.

Boots, shoes, and leggings

364DIG1, 3642821, 3642813, 3642814, 3642815, 3642284, G06F 1540

Patent

active

051519887

ABSTRACT:
A plurality of shared files (10) are accessible by each of a plurality of host processors (30a, 30b, 30c). Each host processor includes a data base access system (36) for accessing a selected record of the shared files. A journal merge key table (38) stores transaction sequence information, particularly a count of the number of transactions performed by each of the processor and the number of times each processor has been down and restarted. Each time the data base access system starts a transaction to access and modify the selected record, the lock manger communicates with the other processors through a communications unit (40). The lock communication blocks the other processors from accessing the same record and communicates more current transaction count information to the other processors. Acknowledgement signals from the other processors return the most current transaction count information therefrom. The processor undertaking the transaction creates a journal record which includes the transaction and the sequence information, particularly the count information. The journal record is stored in a journal file (50) dedicated to the processor. By comparing the count information that is stored with transaction records in other files, the sequence in which the transactions occurred can be readily determined.

REFERENCES:
patent: 4399504 (1983-08-01), Obermarck et al.
patent: 4408273 (1983-10-01), Plow
patent: 4410940 (1983-10-01), Carlson et al.
patent: 4584640 (1986-04-01), MacGregor et al.
patent: 4590555 (1986-05-01), Bourrez
patent: 4621326 (1986-11-01), Rawlins
patent: 4642756 (1987-02-01), Sherrod
patent: 4646231 (1987-02-01), Green et al.
patent: 4791554 (1988-12-01), Hirota et al.
patent: 4819156 (1989-04-01), DeLoime et al.
patent: 4823261 (1989-04-01), Bank et al.
patent: 4823304 (1989-04-01), Frantz et al.
patent: 4875159 (1989-10-01), Cary et al.

Affiliated with

Also associated with

Rating

Intersystem data base sharing journal merge method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Intersystem data base sharing journal merge method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intersystem data base sharing journal merge method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1975016