Data recovery system and method of distributed transaction proce

Details Data recovery system and method of distributed transaction proce Data recovery system and method of distributed transaction proce

1991-05-23

1992-08-18

Atkinson, Charles E.

Excavating

371 12, 3642824, 3642852, 364DIG1, G06F 1114

Patent

active

051406896

ABSTRACT:
In a distributed transaction processing system of a two-phase commit scheme, a client sequentially requests all the servers to perform PHASE I processing. When all the servers complete the PHASE I processing, the client stores data indicating the completion of the processing. When an operation is restarted after a system down of a given server, the server inquires of the client whether all the servers have completed the PHASE I processing. If all the servers have completed the PHASE I processing, the server executes PHASE II processing. If not all the servers have completed the PHASE I processing, the server in which failures occur, causing abnormal system termination performs rollback processing, and the client requests other servers which have completed the PHASE I processing to perform rollback processing.

REFERENCES:
patent: 4648031 (1987-03-01), Jenner
patent: 4819159 (1987-04-01), Shipley et al.
patent: 4868744 (1989-09-01), Reinsch et al.
patent: 4897781 (1990-01-01), Chang et al.
patent: 5046002 (1991-09-01), Takashi et al.

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