03. Firebird 2.5 is come with 3 types of Server

Yes you not see/heard wrong Firebird 2.5 is come with 3 types of Server that is

- SuperServer (Default Installation)

- ClassicServer

- SuperClassic

So which type or mode to use?

Below is just for common cases & suggestion only...

SuperServer

• Small databases or databases with little access
• Small servers
• Environments where the shared cache is more desirable than SuperClassic’s scalability

ClassicServer

• Environments where stability is the top priority
• Multi-processor servers
• Big databases with hundreds of users

SuperClassic

• Multi-processor servers
• Big databases with hundreds of users
• Environments where the dedicated cache is more desirable the SuperServers shared cache
• Environments where ClassicServer no longer scales well

For more detail information

• http://www.sinatica.com/blog/en/index.php/articles/firebird-superserver-classicserver-or-superclassic