Compaq ProLiant 6500 Compaq Parallel Database Cluster Model PDC/O1000 for Orac - Page 21
Clusters Defined
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1-2 Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i on Windows 2000 Administrator Guide Clusters Defined A cluster is an integration of software and hardware products that enables a set of loosely coupled servers and shared storage subsystem components to present a single system image to clients and to operate as a single system. As a cluster, the group of servers and shared storage subsystem components offers a level of availability and scalability far exceeding that obtained if each cluster node operated as a standalone server. The PDC/O1000 uses Oracle8i Parallel Server, which is a parallel database that can distribute its workload among the cluster nodes. Figure 1-1 shows a PDC/O1000 cluster that contains: I Six cluster nodes (ProLiantTM servers) I One Compaq StorageWorksTM RAID Array 4000 (RA4000 Array) or 4100 (RA4100 Array) I One Compaq StorageWorks Fibre Channel Storage Hub (Storage Hub), Compaq StorageWorks FC-AL Switch (FC-AL Switch), or Compaq StorageWorks Fibre Channel SAN Switch (Fibre Channel SAN Switch) I An Ethernet cluster interconnect I A client local area network (LAN) RA4000/4100 Array Node 5 Node 3 Node 1 Node 2 Node 4 Node 6 Storage Hub/Switch Clients Switch (Cluster Interconnect) Client LAN Figure 1-1. Example of a six-node Compaq Parallel Database Cluster Model PDC/O1000