Compaq ProLiant 6400R Compaq Parallel Database Cluster Model PDC/05000 for Ora - Page 27

Cluster Architecture 2-3 High-Availability Features of ProLiant Servers In addition to the increased application and data availability enabled by clustering, ProLiant servers include many reliability features that provide a solid foundation for effective clustered server solutions. The PDC/O5000 is based on ProLiant servers, most of which offer excellent reliability through redundant power supplies, redundant cooling fans, and Error Checking and Correcting (ECC) memory. The high-availability features of ProLiant servers are a critical foundation of Compaq clustering products. Table 2-1 lists the high-availability features found in many ProLiant servers. Table 2-1 High-Availability Components of ProLiant Servers Hot-pluggable hard drives Digital Linear Tape (DLT) Array (optional) Uninterruptible power supplies (optional) ECC memory Offline backup processor Redundant power supplies ECC-protected processor-memory bus Redundant processor power modules PCI Hot Plug slots (in some servers) Redundant cooling fans Shared Storage Components The PDC/O5000 is based on a cluster architecture known as shared storage clustering, in which clustered nodes share access to a common set of shared disk drives. In this discussion, the shared storage includes these components: I MA8000/EMA12000 Storage Subsystem I HSG80 Array Controllers I Fibre Channel SAN Switches for redundant Fibre Channel Fabrics I Storage Hubs for redundant Fibre Channel Arbitrated Loops I KGPSA-BC or KGPSA-CB Host Adapters I Gigabit Interface Converter-Shortwave (GBIC-SW) modules I Fibre Channel cables