06163856 is referenced by 301 patents and cites 25 patents.

A file disaster recovery system that employs geographical replication of data from a local site to remote site in a such a manner that file requests from clients of the local site can be handled by a file server on the remote site following a failover from the local site to the remote site. Geographical data replication software running on a local server checkpoints to a log in local stable storage all information on file operations that change the file state of the local file system. According to a selected mode, the local geographical data replication software flushes information in the log pertaining to the file operations since the last flush to the remote site. At the remote site, compatible remote geographical data replication software running on a remote file server receives the flushed log and replicates in sequence order the file operations represented in the flushed log. The results of the operations are stored on remote stable storage. The local and remote servers can be clusters or single servers. There is no need for commonality, except for operating and file systems, between the local and remote sites. Because operations are replicated and not low level, formatted data, the local and remote stable file storage can be completely different.

Title
Method and apparatus for file system disaster recovery
Application Number
9/87786
Publication Number
6163856
Application Date
May 29, 1998
Publication Date
December 19, 2000
Inventor
Anil Swaroop
Loma Linda
CA, US
Madhusudhan Talluri
Freemont
CA, US
Yousef A Khalidi
Cupertino
CA, US
David Dion
Seattle
WA, US
Agent
Pennie & Edmonds
Assignee
Sun Microsystems
CA, US
IPC
G06F 11/00
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