1. TECHNICAL FIELD OF THE INVENTION;The present invention relates to a defect-based software fault tolerance method for a redundant processor and a computer readable recording medium having recorded thereon a program for realizing the method.;2. The technical problem to be solved by the invention;In the present invention, when a software defect occurs in a redundant processor, the software fault tolerance method and a program for realizing the above method can be realized in consideration of the type and effect of the defect and to reduce the recovery time as much as possible. Its purpose is to provide a computer-readable recording medium that records the data.;3. Summary of Solution to Invention;The present invention includes a first step of detecting a defect during program execution by a self-checking program or an exception handling program inserted in advance by a developer; A second step of determining whether to recover by analyzing the types and effects of the detected defects; A third step of recovering the defect by the recovery program if the defect is recoverable as a result of the determination in the second step; A fourth step of ignoring the defect and continuing if it is determined that the defect does not interfere with the call service as a result of the determination of the second step; And a fifth step of determining the execution direction of the counterpart according to the state of the counterpart processor by checking the performance state of the counterpart processor if the defect is unrecoverable as a result of the determination of the second step.;4. Important uses of the invention;The invention is used in an exchanger having a redundant processor and the like.
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