This is just a convenience list of topics I came accros when looking for a high availability (failover/cluster/redundancy) solution for our WebNMS based application. Feel free to add other links.

Documentation

1. 6.2.3 Using MySQL Replication in WebNMS (Admin Guide)
2. 6.2.2.Using Oracle Replication in WebNMS  (Admin Guide)
3. 5.27 Failover Service (Developer Guide)
4. Hot standby fault failover (default_impl/failover directory)
   

Forum

1. FailOver heartbeat
2. Regarding manual failover
3. Hot Standby Fault Failover and to show the received alarms?
4. Backup of custom conf files during failover
5. Automatic restart of WebNMS FE and BE Processes
6. Using postgre for failover with master-master replication
   

Knowledge base

1. "failover" search query
   

Current prices of DB engines supported by WebNMS

  DB              price                               state of master-master replication
postgre         free                                 not described
MySQL         $2000/year/server            described & works
Oracle          probably lot more :) *        setup described in the manual
MSSQL        ?                                      not described in manual
Sybase         ?                                      not described in manual
Solid             ?                                      not described in manual
TimesTen      ?                                      not described in manual

*) sales representatives have not replied me yet

WebNMS integrates MySQL and Oracle Database 11g to help communications service providers to achieve high scalability, performance and reliability