Patent ID: 7117393
Filing Date: 2006-10-03
Classification: G06F

Abstract:
1. A failover method in a redundant computer system with a storage disk device connected to an active computer system and a stand-by computer system taking over a process of said active computer system, comprising the steps of: generating a secondary volume on said storage disk device to maintain a paired configuration, said secondary volume being a replica of a primary volume used by said active computer system; pair splitting said secondary volume from said primary volume at the moment of detecting an occurrence of failure on said active computer system; taking over by said stand-by computer system the process performed by said active computer system by making use of said pair split secondary volume, further comprising the steps of: partitioning said primary and secondary volumes to a data and log areas to perform a pair split to separate said data area of the paired volumes at the moment of detecting an occurrence of a failure in said active computer system; and after the detection, performing a pair split to separate said log area of paired volumes at the moment of a predetermined number of times of detection of the failure in said active computer system.