MasterSlave

Introduction to Master / Slave

The following are the different kinds of Master/Slave configurations available:

Master Slave Type	Requirements	Pros	Cons
Shared File System Master Slave	A shared file system such as a SAN	Run as many slaves as required. Automatic recovery of old masters	Requires shared file system
JDBC Master Slave	A Shared database	Run as many slaves as required. Automatic recovery of old masters	Requires a shared database. Also relatively slow as it cannot use the high performance journal

If you are using a shared network file system such as a SAN we recommend a Shared File System Master Slave. If you are happy to dispense with the high performance journal and are using pure JDBC as your persistence engine then you should use JDBC Master Slave instead.