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

2-50 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
I/O Path Configuration Rules for Redundant FC-ALs
The following rules must be observed in I/O path configurations for
PDC/O2000 clusters with redundant FC-ALs:
■ Each redundant FC-AL must use either an active/standby or
active/active configuration. The active/standby or active/active
configuration is confined to that redundant FC-AL.
■ For each redundant FC-AL, at least two Fibre Host Adapters are
installed in each cluster node (one for each Storage Hub or FC-AL
Switch).
■ For each redundant FC-AL, at least two Storage Hubs or FC-AL
Switches (Storage Hub/FC-AL Switch #1 and Storage Hub/FC-AL
Switch #2) are installed between the nodes and the RA4000/RA4100
Arrays.
■ A minimum of one RA4000/RA4100 Array is required for the
active/standby configuration.
■ A minimum of two RA4000/RA4100 Arrays is required for the
active/active configuration.
■ Each RA4000/RA4100 Array must contain two array controllers to
provide redundant paths.
■ Only one of the two array controllers in an RA4000/RA4100 Array can
be active at a given time. The other array controller is the standby
controller.
■ I/O path hardware components must be connected using Fibre Channel
cables and GBIC-SW modules.