HP D7171A - NetServer - LPr Introduction Manual

Netserver NetServer NetServer
HP
september 2000
Documentation
HP Netserver High Availability SPOFless MSCS Cluster Solution
Introduction
This document profiles efforts in evaluating high availability cluster solutions
managed by Microsoft
and Windows
evaluated are two-node clusters using redundant Fibre Channel Arbitrated
Loop (FCAL) technology for the server to storage interconnect and are
intended to be highly reliable and highly available configurations with No
Single Point of Failure (NSPOF) also known in HP as SPOFless.
High availability clusters are designed to reduce risk and costs of downtime
due to hardware or software faults. This high level of system and application
availability is accomplished through the use of redundant and fault tolerant
technologies implemented on different levels of hardware and software.
For example, clustering software improves availability by allowing applications
and services to be transferred to another computer node if a failure event
occurs on one of the nodes.
Overview of the SPOFless System
Achieving Higher Availability through Component Redundancy
SPOFless ensures that a system will be highly available and accessible in
case of any system component failure.
software components eliminates single points of failure. SPOFless system
redundancy falls into three categories.
Redundant Hardware Components: system drives, RAID sets, external
storage controllers, host bus adapters (HBA), network adapters,
multiprocessor servers, Fibre Channel (FC) hubs, switches, power
supplies, processor power modules, and fans.
Redundant Software Components: Microsoft
fault tolerance and adaptive load balancing, HBA and controller drivers
using firmware that supports fail over, and software mirroring.
Fault Tolerant Techniques: hot swappable hard drives, FC controllers,
hot plug/replace/upgrade PCI adapters, cache mirroring, and battery
backup.
®
Cluster Server in Windows NT 4.0
®
2000 Advanced Server operating systems.
®
Enterprise Edition
The solutions
Using redundant hardware and
® Cluster Server, network
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