Patent ID: 6931502
Filing Date: 2005-08-16
Classification: G06F,Y10S

Abstract:
1. In a primary computer system that communicates with a backup computer system, a method for restoring data at the primary computer system after failure of the primary computer system, comprising: receiving a write request at the primary computer system; transmitting a copy of the write request to the backup computer system, the copy of the write request being stored in a backup delta queue of the backup computer system until such time that the primary computer system acknowledges that the write operation has been executed at the primary computer system; before the write request is executed at the primary computer system, experiencing failure of the primary computer system that results in loss of the write request at the primary computer system; in response to the failure, receiving the copy of the write request from the backup delta queue of the backup computer system; and executing the copy of the write request at the primary computer system.