Method and apparatus for providing database system replication i

Details Method and apparatus for providing database system replication i Method and apparatus for providing database system replication i

1997-02-28

1999-08-10

Amsbury, Wayne

Data processing: database and file management or data structures

Database design

Data structure types

707202, 707204, G06F 1700

Patent

active

059374144

ABSTRACT:
A method and apparatus for replicating data among sites is provided. The method allows changes to the same body of data to be replicated synchronously to some destination sites and asynchronously to other destination sites. Such mixed propagation configurations allow synchronous updating to selected remote copies of replicated data where data integrity is a high priority, and asynchronous propagation to remaining copies of replicated data in order to allow transactions to be committed locally regardless of whether the transaction is committed at a remote copy of the replicated data. The propagation mode is selectable by a user on a site-to-site basis for each replicated body of data, thus providing a mix of availability and consistency that is not possible in purely synchronous or purely asynchronous replication systems.

REFERENCES:
patent: 5333312 (1994-07-01), Wang
patent: 5440727 (1995-08-01), Bhide et al.
patent: 5561809 (1996-10-01), Elko et al.
patent: 5596744 (1997-01-01), Dao et al.
patent: 5720029 (1998-02-01), Kern et al.
patent: 5724556 (1998-03-01), Souder et al.
patent: 5742792 (1998-04-01), Yanai et al.

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