Recovery facility for incomplete sync points for distributed app

Details Recovery facility for incomplete sync points for distributed app Recovery facility for incomplete sync points for distributed app

1990-05-16

1994-06-07

Beausoliel, Jr., Robert W.

Boots, shoes, and leggings

3642813, 3642816, 364DIG1, G06F 1100

Patent

active

053197747

ABSTRACT:
To recover a failed commit procedure, a first recovery facility collects and compares sync point state information from a variety of different types of resources including a data repository and a protected conversation. The comparison of the sync point state information is made automatically in response to a sync point failure event. A second recovery facility serving another execution environment notifies the first recovery facility after a failure and subsequent recovery procedure of the second execution environment has completed. The first recovery facility makes automatic cyclic attempts to communicate with the second recovery facility. The first recovery facility can receive a manually initiated but automatically simulated response of sync point state information when there is a failure such that actual sync point state information cannot be received. The first recovery facility is responsive to the simulated sync point state information to proceed with a recovery operation substantially as if actual sync point state information were received.

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