Introduction To &slony1; &slony1; is a master to multiple slaves replication system for &postgres; supporting cascading and slave promotion. Key features of &slony1; include: &slony1; can replicate data between different &postgres; major versions &slony1; can replicate data between different hardware or operating systems &slony1; allows you to only replicate some of the tables to slave &slony1; allows you to replicate some tables to one slave and other tables to another slave &slony1; allows different database servers to be the origin(master) for different tables This book is intended as an administration guide and reference for &slony1; version &version; If you are using a different version of &slony1; then you should refer to the administration guide for that version.