Fred Palma | Computer Scientist

Slony-I is a “master to multiple slaves” replication system supporting cascading and slave promotion. The big picture for the development of Slony-I is as a master-slave system that includes the sorts of capabilities needed to replicate large databases to a reasonably limited number of slave systems. “Reasonable,” in this context, is on the order of a dozen servers. If the number of servers grows beyond that, the cost of communications increases prohibitively, and the incremental benefits of having multiple servers will be falling off at that point.

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