This is a repackaged open source Stack wherein additional charges lies for pre-configured stack.
Several modes of high-availability are employed, which includes both file-system and database row-level locking mechanisms, true replication using Apache or sharing of the persistence store via a shared file system.

Intellectual Property Statement
This offer inculcates a wide range copies of open source and free software, but the Copyrights, Patents and Trademarks are legal protections for original owner.