초록 ▼

A recovery mechanism restarts jobs following correction of a system failure and automatically marks the jobs for interruption at a logical boundary. The logical boundary is above logical file updating functions such that logical files are in a known state when jobs reach the boundary. When a system

A recovery mechanism restarts jobs following correction of a system failure and automatically marks the jobs for interruption at a logical boundary. The logical boundary is above logical file updating functions such that logical files are in a known state when jobs reach the boundary. When a system failure is detected which has not yet resulted in lost data, an image of working memory, including hardware status is saved on nonvolatile storage. After the failure has been resolved, the system is initially loaded with operating programs (IPL) and working memory is reloaded from the nonvolatile storage. All jobs which were reloaded are marked for interrupt at a machine instruction boundary, and processing is started. After all jobs have reached the boundary, or a predetermined time has elapsed, processing is stopped and the system is re-IPLed. There are few system index recoveries to be performed, since most jobs reached a point where logical files were synchronized with corresponding data.

대표청구항 ▼

A method of restarting a computer system in the event of a failure, the computer system running jobs and having directories relating to data, a main storage area, and at least one direct access storage device, the method comprising the steps of: detecting the failure; saving an image of main storage

A method of restarting a computer system in the event of a failure, the computer system running jobs and having directories relating to data, a main storage area, and at least one direct access storage device, the method comprising the steps of: detecting the failure; saving an image of main storage into a nonvolatile storage area in response to detection of the failure; correcting the failure; reloading the main storage image into said main storage after correction of the failure; marking jobs for interruption at a predetermined system boundary; and running jobs for a predetermined time to permit jobs to attain the predetermined system boundary such that directories are in a known state.