No data loss IT disaster recovery over extended distances

Details No data loss IT disaster recovery over extended distances No data loss IT disaster recovery over extended distances

2006-09-22

2009-08-18

Maskulinski, Michael C (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S005110, C714S006130, C714S006130, C714S042000

Reexamination Certificate

active

07577868

ABSTRACT:
Systems and methods operating over extended distances provide for recovery of data and operational continuity of computer applications accessing data within an information technology system if an event occurs effecting access to the data. In one embodiment, an extended distance data recovery system (100) includes first, second and third data storage devices (112, 122, 132) located at respective first, second and third sites (110, 120, 130). The second and third sites (120, 130) are remotely located from the first site (110) with the second site (120) being nearby the first site (110). The first data storage device (112) has data (116) stored thereon. A computer executable control process (150) directs synchronous replication of the data (116), either at the storage level or at the application level, onto the second data storage device (122). The control process (150) also directs asynchronous replication of the data (116) from the second data storage device (122) onto the third data storage device (132) and coordinates among the three sites (110, 120, 130) the state of application servers, storage replication, network address changes, and other prerequisite aspects of the IT infrastructure required to allow the application servers to successfully start at the disaster recovery site.

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