3.2.1 Hardware requirements From an infrastructure perspective, you must install the Message flow server, the Administrative server, and the Gateways on separate machines. With the AGPI server, you have the option either to install it or not, and where to install it. You can install it on the same machine as the Administrative server or any other machine in your infrastructure. Message Flow server The minimum requirements for the Message Flow server are: Processor: an IBM xSeries and Intel-based dual processor system (or equivalent) with a minimum processor speed of 2.4 GHz Minimum memory requirements: 4 GB Minimum DASD requirement: 144 GB For high availability: ­ (1) Mirrored 36 GB boot disk ­ (1) Mirrored 3 x 36 GB shared disk Additional high-availability hardware requirements: ­ Microsoft certified cluster machine ­ Shared disk subsystem with RAID Administrative server The minimum requirements for the Administrative server are: Processor: an IBM xSeries and Intel-based dual processor system (or equivalent) with a minimum processor speed of 2.4 GHz Minimum memory requirements: 4 GB Minimum DASD requirement: 144 GB For high availability: ­ (1) Mirrored 36 GB boot disk ­ (1) Mirrored 3 x 36 GB shared disk Additional high-availability hardware requirements: ­ Microsoft certified cluster machine ­ Shared disk subsystem with RAID Chapter 3. Installing and configuring IBM WebSphere Business Integration for HCN 65