iNTERFACEWARE™ Inc.

Setting Up the Required Hardware for the Failover Cluster

To set up the hardware required for the failover cluster:

1. Set up two redundant servers

• Each server should have the same hardware components to minimize any long-term administration costs. Mixing and matching hardware components could be less expensive initially, but may cost more to troubleshoot later on should they fail. Since Iguana is a mission-critical application and you cannot afford for it to have unplanned downtime, this is a critical step. Additionally, each server should have its own local storage device and have access to a shared storage database.

2. Install the same software on each server

• Each server should be running the same operating system with Iguana installed. Additionally, each copy of Iguana must have identical channel configurations. Having identical servers means that one server can handle the operation of Iguana seamlessly in the event of a failover.

3. Set up interconnection between the two servers

• Communication between the servers is a necessary requirement that allows each node to determine if the other is still functioning.

	Although some failover solutions offer support for running different operating systems for each node (e.g. Symantec's Veritas Cluster Server), the most common clustering solutions require identical hardware and operating system environments.