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

Architecture 2-9
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: c-ch2 Cluster Architecture.doc Last Saved On: 6/11/01 11:20 AM
Availability Features of the Shared Storage
Components
An important part of a high-availability system is the ability to improve data
availability, traditionally accomplished by implementing RAID technology.
Hardware RAID is an important part of the RA4000/RA4100 Array storage
subsystem. RAID is implemented on the RA4000 Array Controller in the
RA4000/RA4100 Array. The RA4000/RA4100 Array also accepts redundant,
hot-pluggable power supplies and a hot-pluggable fan module.
The RA4000 Array Controller supports pre-failure notification on hard drives
and provides an Array Accelerator made with ECC memory. The Array
Accelerator is backed with onboard rechargeable batteries, ensuring that the
data temporarily held (cached) is safe even with equipment failure or power
outage. For a complete list of features and accompanying descriptions, refer to
the Compaq StorageWorks RAID Array 4000 User Guide or the
Compaq StorageWorks RAID Array 4100 User Guide.
I/O Path Configurations in a
Non-Redundant Fibre Channel Fabric
Overview of Fibre Channel Fabric SAN Topology
Fibre Channel standards define a multi-layered architecture for moving data
across the storage area network (SAN). This layered architecture can be
implemented using the Fibre Channel Fabric or the Fibre Channel Arbitrated
Loop (FC-AL) topology. The PDC/O1000 supports both topologies.
Fibre Channel SAN Switches provide full 100 MBps bandwidth per switch
port. Whereas the introduction of new devices to a FC-AL Storage Hub further
divides its shared bandwidth, adding new devices to a Fibre Channel SAN
Switch increases the aggregate bandwidth.