Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide

2-10 Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide
Compaq Confidential – Need to Know Required
Writer: John Blackburn Project: Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide Comments:
Part Number: 225082-002 File Name: c-ch2 Cluster Architecture.doc Last Saved On: 6/13/01 10:21 AM
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One or more RA4000/RA4100 Arrays, each containing two single-port
RA4000 Array Controllers
■ GBIC-SW modules installed in the Fibre Host Adapters, Fibre Channel
SAN Switches, and array controllers
■ Fibre Channel cables used to connect the Fibre Host Adapters to the
Fibre Channel SAN Switches and the Fibre Channel SAN Switches to
the array controllers
IMPORTANT: For detailed information about cascading two Fibre Channel SAN Switches,
refer to the latest Compaq StorageWorks documentation. This guide does not document
cascaded configurations for the Fibre Channel SAN Switch.
A redundant Fibre Channel Fabric consists of from two to four individual
fabrics, each of which traverses a single Fibre Channel SAN Switch. The
number of fabrics present is determined by the number of Fibre Host Adapters
per node that are dedicated to the redundant Fibre Channel Fabric: two Fibre
Host Adapters per node create two fabrics; four Fibre Host Adapters per node
create four fabrics.
Figure 2-1 shows a two-node PDC/O2000 with a redundant Fibre Channel
Fabric that contains two fabrics, one for each Fibre Host Adapter per node.
The components and cable paths for the first fabric are shaded to distinguish
them from the components and cables for the second fabric.
Fibre Host
Adapters (2)
RA4000/4100 Array #1
RA4000/4100 Array #2
Fibre Channel
SAN Switch #1
Node 1 Node 2
Fibre Channel
SAN Switch #2
Fibre Host
Adapters (2)
Figure 2-1. Two-node PDC/O2000 with a two-fabric redundant Fibre
Channel Fabric
Used in conjunction with the I/O path failover capabilities of Secure Path
software, this redundant Fibre Channel Fabric configuration gives cluster
resources increased availability and fault tolerance.