Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide

2-20 Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide

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Writer: John Blackburn Project: Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide

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Part Number: 225083-002 File Name: c-ch2 Cluster Architecture.doc Last Saved On: 6/11/01 11:20 AM

Maximum Distances Between Cluster Nodes and

Shared Storage Subsystem Components in a

Non-Redundant FC-AL

By using standard short-wave Fibre Channel cables and GBIC-SW modules,

an RA4000/RA4100 Array can be placed up to 500 meters from the Storage

Hub or FC-AL Switch, and the Storage Hub or FC-AL Switch can be placed

up to 500 meters from the Fibre Host Adapter in each cluster node. See

Figure 2-9.

500 m

Storage Hub/FC-AL Switch

RA4000/4100 Array

Node 1Node 3

Node 2 Node 4

Figure 2-9. Maximum distances between cluster nodes and shared

storage components in a non-redundant FC-AL

I/O Data Paths for a Non-Redundant FC-AL

The shared storage components in a non-redundant FC-AL use two distinct

I/O data paths, separated by the Storage Hub or FC-AL Switch:

■ One path runs from the Fibre Host Adapter in each node to the Storage

Hub or FC-AL Switch.

■ Another path runs from the Storage Hub or FC-AL Switch to the

RA4000 Array Controller in each RA4000/RA4100 Array of that

non-redundant FC-AL.