Electrical computers and digital processing systems: multicomput – Remote data accessing – Accessing a remote server
Patent
1998-05-29
2000-11-07
Meky, Moustafa M.
Electrical computers and digital processing systems: multicomput
Remote data accessing
Accessing a remote server
G06F 1300
Patent
active
061449997
ABSTRACT:
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.
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Dion David
Khalidi Yousef A.
Swaroop Anil
Talluri Madhusudhan
Meky Moustafa M.
Sun Microsystems Incorporated
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