Method for making a data base available to a user program during

Details Method for making a data base available to a user program during Method for making a data base available to a user program during

1995-03-01

1998-03-31

Decady, Albert

395618, G06F 1100

Patent

active

057348170

ABSTRACT:
A method and apparatus for allowing a user program, which has provided a global transaction to a remote system, to continue operation after only a partial recovery, thereby significantly reducing the delay associated with a detected fault or failure. The local transaction steps may be recovered by the local system. For all global transaction steps in a "ready" state, a data base management system may re-establish the data base locks and system environment variables associated therewith. Thereafter, the user programs may continue operation and may access the un-locked portion of the data base, including the portion associated with the local transactions. In the meantime, a transaction manager may determine the actual status of the global transaction steps by performing the necessary communications with the remote systems. Once the actual status of a particular global transaction step is determined by the transaction manager, the global transaction step may be recovered, and the corresponding data base locks may be released. As the transaction manager determines the actual state of the remaining global transaction steps, more of the data base may be released to the user programs. Eventually, the entire data base may be available to the user programs.

REFERENCES:
patent: 3389380 (1968-06-01), Ashbaugh et al.
patent: 3461433 (1969-08-01), Emerson
patent: 4355355 (1982-10-01), Butwell et al.
patent: 4521846 (1985-06-01), Scalzi et al.
patent: 4819159 (1989-04-01), Shipley
patent: 4825358 (1989-04-01), Letwin
patent: 4825363 (1989-04-01), Baumann et al.
patent: 4827400 (1989-05-01), Dunwell et al.
patent: 4827406 (1989-05-01), Bischoff et al.
patent: 4835677 (1989-05-01), Sato et al.
patent: 4841436 (1989-06-01), Asano et al.
patent: 4853849 (1989-08-01), Bain, Jr. et al.
patent: 4862349 (1989-08-01), Foreman et al.
patent: 4890221 (1989-12-01), Gage
patent: 4903196 (1990-02-01), Pomerene et al.
patent: 4933940 (1990-06-01), Walter
patent: 4939640 (1990-07-01), Bachman et al.
patent: 4979098 (1990-12-01), Baum et al.
patent: 5065311 (1991-11-01), Masai et al.
patent: 5138710 (1992-08-01), Kruesi
patent: 5193162 (1993-03-01), Bordsen
patent: 5210840 (1993-05-01), Fukagawa et al.
patent: 5247664 (1993-09-01), Thomson
patent: 5319773 (1994-06-01), Britton
patent: 5325519 (1994-06-01), Long
patent: 5333314 (1994-07-01), Masai
patent: 5404508 (1995-04-01), Konrad
patent: 5414840 (1995-05-01), Rengarajan et al.
patent: 5432926 (1995-07-01), Citron
patent: 5530800 (1996-06-01), Larsson
patent: 5561798 (1996-10-01), Haderle et al.

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