July 2005
Intermediate to advanced
1032 pages
27h 10m
English
Content preview from PostgreSQL, Second Edition
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Chapter 24. Replicating PostgreSQL Data with Slony
Replication is the process of distributing data from database to database. Typically, the databases reside on different physical computers. PostgreSQL has supported a number of replication mechanisms over the years, but Slony is emerging as the preferred replication solution. Slony offers asynchronous, one-way, cascading replication of data from one origin to any number of subscribers.
Asynchronous means that the copy of the data that you find at a subscriber may not be the most current data—the subscriber may be “out of sync” with the origin. In fact, you may find different data at each subscriber. Asynchronous replication implies that a subscriber does not need to be up-and-running all the ...
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