Asynchronous resynchronization of a commit procedure

• US 5,613,060 A
• Filed: 10/19/1992
• Issued: 03/18/1997
• Est. Priority Date: 05/16/1990
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Thatcher, Timothy J., Maslak, Barbara A. M., Britton, Kathryn H., Gray, James P., Citron, Andrew P.
• Primary Examiner(s): Beausoliel, Jr., Robert W.
• Assistant Examiner(s): HUA, LY
• Application Number:
  US07/963,889
• Time in Patent Office: 1,611 Days
• Field of Search: 395/575, 395/182.13, 395/182.08, 395/181, 395/180, 395/650
• US Class Current: 714/15
• CPC Class Codes: G06F 9/466 Transaction processing

Abstract

A computer system and process efficiently provides resource recovery for a failure during a commit procedure. An application is run on a processor and requests a work operation involving a resource such as a protected conversation with another application in a different real machine. A commit procedure is begun for the work request, and if the commit procedure fails before completion, the following steps are taken to optimize the use of one or both of the applications. At some time after the commit procedure fails, a return code is sent to at least the application that initiated the commit indicating the result of the application commit order and that the application can continue to run and does not have to wait for resynchronization (recovery). Then, while the initiating application continues to run and do other useful work, resynchronization is implemented in parallel, asynchronously.

Claims

1. A computer program product for operating a computer, said computer program product comprising:

a computer readable, magnetic medium;

first program instruction means, recorded on said medium, for instructing a computer processor to control execution of an application which requests a work operation;

second program instruction means, recorded on said medium, for instructing a computer processor to attempt to implement a commit procedure for said work operation;

third program instruction means, recorded on said medium, for instructing a computer processor to notify said application that said application can continue with other operations if said commit procedure fails before completion, whereby said application need not wait for said commit procedure to be resynchronized; and

fourth program instruction means, recorded on said medium, for instructing a computer processor to recover from said failed commit procedure by resynchronizing said commit procedure asynchronously relative to said application; and

wherein each of said program instruction means is executable by the associated computer processor.

2. A computer program product as set forth in claim 1 further comprising:

fifth program instruction means, recorded on said medium, for instructing a computer processor to control execution of another application; and

sixth program instruction means, recorded on said medium, for instructing a computer processor to implement a protected conversation between said application; and

wherein said commit procedure is a two-phase procedure to commit updates communicated in said protected conversation;

said failure is due to a loss of communication between said applications; and

said fifth and sixth program instruction means are each executable by the associated processor.