Patent ID: 6467045
Filing Date: 2002-10-15
Classification: G06F

Abstract:
A method for supporting recovery processing from a failure of a storage device in a computer system including a processing unit and a storage device, wherein a batch job including a plurality of jobs is executed on said processing unit, said method comprising the steps of:extracting a job to be executed in re-execution processing as a direct re-execution job, each job having been executed in an executed batch job based on transition history information that has been obtained during execution of said executed batch job and includes information relating to executed jobs and operated on data-sets; extracting a job to be executed in re-execution job processing as an indirect re-execution job from each data-set that has been operated on by a job extracted as said direct re-execution job; determining a restoration generation number representing how many generations should be considered for a data-set in a respective operation that has been performed by a job extracted as said direct re-execution job or said indirect re-execution job, if the data-set is managed in generation; a deletion method determining step of inspecting, as to each data-set that has been finally deleted in said executed batch job, whether the data-set has been operated on by at least one job extracted as said direct re-execution job and a job extracted as said indirect re-execution job, and whether the data-set is stored in a storage device identified by said storage device ID, and determining a way of and a timing for deletion of the data-set on the basis of a result of the inspecting; a restoration data-set determining step of inspecting, as to each data-set that has been operated on by at least one of a job extracted as said direct re-execution job and a job extracted as said indirect re-execution job, an operation history of the data-set, and designating a data-set to be restored from backup individually; and outputting information that is required to restore a failed storage device on the basis of results of the above respective steps.