> We have been using Firebird for quite a while now and are very pleased with the performance and behaviour.
>
> However, we are looking into (and are being asked by our clients) to clustering, load balancing and automatic failover behaviour. As we are using Linux as our primary server setup, this should all of course work under Linux.
>
> Are there any pointers/documents/tools available on how to setup clustering and/or load balancing? Are there any environments know that can handle automatic failovers (back and forth)?
>
> Any information would be greatly appreciated.

Some kind of fail-over cluster and load balancing you can acquire
using replication between few Firebird servers.

SY, SD.