If the slave fails it is possible to fall back to the master db. This is done simply by including the master in the slave pools (see the extreme configuration example below).
Likewise, if the master fails it is possible to fall back to the slave db. This is done by including the slave in the master pools. The system will then fall into read-only mode, since there's no master available, resulting in a messsage on all pages stating that the system is in read-only mode. Remember to set the "readonly" setting to TRUE on the slave connections, in order for this to work.
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Failover
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