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

Cluster Planning 4-5
Compaq Confidential – Need to Know Required
Writer: John Blackburn Project: Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide
Comments:
Part Number: 225083-002 File Name: e-ch4 Cluster Planning.doc Last Saved On: 6/11/01 11:20 AM
Planning Shared Storage Components for
Non-Redundant Fibre Channel Arbitrated Loops
Each non-redundant Fibre Channel Arbitrated Loop (FC-AL) in a PDC/O1000
uses these hardware components:
■ One Fibre Host Adapter in each node
■ One Compaq StorageWorks Storage Hub (Storage Hub) or
Compaq StorageWorks FC-AL Switch (FC-AL Switch)
■ One or more RA4000 Arrays or RA4100 Arrays
■ One single-port RA4000 Array Controller installed in each
RA4000/RA4100 Array
NOTE: For more information about redundant Fibre Channel Arbitrated Loops (FC-ALs) in
a PDC/O1000 cluster, see Chapter 2, “Cluster Architecture.”
The FC-AL Switch is available in an 8-port model that can be expanded to
11 ports. The Storage Hub is available in 7-port and 12-port models.
To determine which FC-AL Switch or Storage Hub model is appropriate for a
non-redundant FC-AL in your cluster, identify the total number of Fibre Host
Adapters and RA4000/RA4100 Arrays connected to that non-redundant
FC-AL. For the FC-AL Switch, if the combined number of Fibre Host
Adapters and arrays exceeds eight, you must use an 11-port FC-AL Switch.
For the Storage Hub, if the combined number of Fibre Host Adapters and
arrays exceeds seven, you must use a Storage Hub 12. Also consider the
possibility of future cluster growth when you select your model.
The number of RA4000/RA4100 Arrays and shared disk drives used in a
PDC/O1000 depends on the amount of shared storage space required by the
database, the hardware RAID levels used on the shared storage disks, and the
number and storage capacity of disk drives installed in the enclosures. Refer to
“Raw Data Storage and Database Size” in this chapter for more details.
NOTE: For improved I/O performance and cluster integrity, as you increase the number of
nodes in a PDC/O1000 cluster, you should also increase the aggregate bandwidth of the
shared storage subsystem by adding more or higher-capacity disk drives.