Compaq 307560-001 PCI Bus Balancing and Optimization on Compaq ProLiant Server - Page 6

ECG073/0398 WHITE PAPER (cont.) ... Example Configurations Table 2 explains where to place controllers to enable PCI bus balancing on Compaq ProLiant servers that contain the dual-peer bus architecture. For example, a system configuration might consist of one NIC and two drive array controllers (configuration #3 highlighted in Table 2). As demands change and the system bandwidth needs to increase, the system administrator changes the configuration to add another NIC to the system. As shown in configuration #4 (highlighted in Table 2), the system administrator should place the new network controller on Bus X so the PCI bus remains balanced. TABLE 2 : PCI BUS BALANCING IN A DUAL-PEER ARCHITECTURE Config Device Type # Bus X* Bus Y* 1 1 Network Interface Controller Drive Array Controller 1 Drive Array Controller Network Interface Controller 2 2 Network Interface Controllers Network Interface Controller 1 Drive Array Controller Drive Array Controller Network Interface Controller 3 1 Network Interface Controller Drive Array Controller 2 Drive Array Controllers Network Interface Controller Drive Array Controller 4 2 Network Interface Controllers Network Interface Controller 2 Drive Array Controllers Drive Array Controller Network Interface Controller Drive Array Controller 5 2 Network Interface Controllers Network Interface Controller 3 Drive Array Controllers 2 Drive Array Controllers Network Interface Controller Drive Array Controller 6 3 Network Interface Controllers 2 Network Interface Controllers 2 Drive Array Controllers Drive Array Controller Network Interface Controller Drive Array Controller Optimal Preference: 1 DualPort Network Interface Controller 1 Drive Array Controller Optimal Preference: 1 Network Interface Controller 1 Drive Array Controller 7 2 Network Interface Controllers Network Interface Controller 4 Drive Array Controllers 2 Drive Array Controllers Network Interface Controller 2 Drive Array Controllers 8 2 Network Interface Controllers Network Interface Controller 5 Drive Array Controllers 3 Drive Array Controllers Network Interface Controller 2 Drive Array Controllers 9 3 Network Interface Controller 2 Network Interface Controllers 4 Drive Array Controllers 2 Drive Array Controllers Network Interface Controller 2 Drive Array Controllers Optimal Preference: 1 DualPort Network Interface Controller 2 Drive Array Controllers Optimal Preference: 1 Network Interface Controller 2 Drive Array Controllers * Bus X and Y have no bearing to the primary and secondary bus. It could be either. 6