The solidDB^® HotStandby component can be used in combination with solidDB^® advanced replication. Advanced replication provides bidirectional, periodically occurring data synchronization that allows you to create a distributed system that contains master and replica servers. With HotStandby, you can make any of the database servers of the distributed system highly available.

The diagram below shows a simple distributed system that contains a master database and two replica databases. Each replica contains at least a subset of the data of the master database. Each of the database servers has been made fault-tolerant with HotStandby replication. Advanced replication occurs between the Primary servers of the database server hierarchy. In case of a problem with any of the Primary database servers, the failed node can do a HotStandby failover making the Secondary server of that node the new Primary. Advanced replication can now continue with the new Primary server.