Patent ID: 7149919
Filing Date: 2006-12-12
Classification: G06F

Abstract:
1. A disaster recovery system with sequenced cascaded resynchronization comprising: a plurality of data centers, the individual data centers comprising a communication interface, a data storage, and a controller; a distributed control system distributed and executable in the controllers of the plurality of data centers, and capable of coordinating operations via the communication interfaces of the plurality of data centers to resynchronize a plurality of communication links between data center pairs of the plurality of data centers, the communication links including at least one synchronous link and at least one asynchronous link; a synchronous disaster recovery link that feeds an asynchronous disaster recovery link in a cascaded disaster recovery configuration; and a control process executable on the distributed control system that responds to suspension of the synchronous disaster recovery link by suspending the asynchronous disaster recovery link prior to resynchronizing the synchronous disaster recovery link.