Compaq ProLiant 6400R Compaq Parallel Database Cluster Model PDC/O2000 for Ora - Page 33
Fibre Channel Cables, I/O Path Configurations for Redundant Fibre Channel Fabrics
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Cluster Architecture 2-9 Fibre Channel Cables Shortwave (multi-mode) fibre optic Fibre Channel cables are used to connect the nodes, the Storage Hubs, FC-AL Switches, or Fibre Channel SAN Switches, and RA4000/RA4100 Arrays in a PDC/O2000 cluster. I/O Path Configurations for Redundant Fibre Channel Fabrics Overview of Fibre Channel Fabric SAN Topology Fibre Channel standards define a multi-layered architecture for moving data across the storage area network (SAN). This layered architecture can be implemented using the Fibre Channel Fabric or the Fibre Channel Arbitrated Loop (FC-AL) topology. The PDC/O2000 supports both topologies. A redundant Fibre Channel Fabric is two to four Fibre Channel SAN Switches installed between Fibre Host Adapters in a PDC/O2000's cluster nodes and the array controllers in the shared storage subsystems. These hardware components cannot be shared by other redundant Fibre Channel Fabrics or redundant Fibre Channel Arbitrated Loops in the cluster. Fibre Channel SAN Switches provide full 100 MBps bandwidth per switch port. Whereas the introduction of new devices to FC-AL Storage Hubs further divides their shared bandwidth, adding new devices to Fibre Channel SAN Switches increases the aggregate bandwidth. Redundant Fibre Channel Fabrics A redundant Fibre Channel Fabric refers to the redundant hardware implemented to connect Fibre Host Adapters to a particular set of shared storage devices in a PDC/O2000 that uses Fibre Channel SAN Switches. Each redundant Fibre Channel Fabric consists of the following hardware: I Two or more Fibre Host Adapters in each node I Two to four Fibre Channel SAN Switches